(* - Mineral name not approved by the IMA) (! - New Dana classification number has been added or changed) (? - IMA Discredited Mineral Species Name)
Optics MINERAL Uniaxial (?). Ankangite Uniaxial (?). Apuanite Uniaxial (?). Asbolane Uniaxial (?). Barium-alumopharmacosiderite ? Uniaxial (?). Cesplumtantite Uniaxial (?). Delafossite Uniaxial (+). Ecandrewsite Uniaxial (?). Eskolaite Uniaxial (?). Ferronigerite-6N6S ! Uniaxial (?). Fougerite ! Uniaxial (-). Hawthorneite Uniaxial (-). Hibonite Uniaxial (-). Hundholmenite-(Y) ! Uniaxial (-). Hydroxylpyromorphite ! Uniaxial (-). Ilmenite Uniaxial (-). Ilmenorutile Uniaxial (?). Irtyshite Uniaxial (?). Iwakiite Uniaxial (-). Kamiokite Uniaxial (?). Karelianite Uniaxial (?). Kusachiite Uniaxial (?). Lindqvistite Uniaxial (?). Lindsleyite Uniaxial (?). Lithiophorite Uniaxial (?). Loveringite Uniaxial (?). Lusungite ? Uniaxial (?). Macedonite Uniaxial (?). Magnetoplumbite Uniaxial (+). Mannardite Uniaxial (?). Mathiasite Uniaxial (?). Natrotantite Uniaxial (?). Nolanite Uniaxial (?). Pintadoite Uniaxial (-). Plumboferrite Uniaxial (?). Pyrolusite Uniaxial (-). Rinmanite ! Uniaxial (?). Santarosaite ! Uniaxial (-). Schorl-(F) ! Uniaxial (?). Stavelotite-(La) ! Uniaxial (+). Struverite ? Uniaxial (?). Tapiolite-(Mn) Uniaxial (?). Versiliaite Uniaxial (?). Xifengite Uniaxial (?). Yimengite Uniaxial (?). Zaccagnaite ! Uniaxial (?). Zenzenite Uniaxial (?). Zincalstibite ! Uniaxial (?). Zirconolite-3T Uniaxial (?), a=1.3, b=1.3, bire=0.0000. Methane hydrate-II ! Uniaxial (-), e=1.309, w=1.313, bire=0.0040. Malladrite Uniaxial (?), a=1.32, b=1.33, bire=0.0100. Ice Uniaxial (-), e=1.34, w=1.35, bire=0.0100. Demartinite ! Uniaxial (-), e=1.342, w=1.349, bire=0.0070. Chiolite Uniaxial (+), w=1.378, e=1.39, bire=0.0120. Sellaite Uniaxial (-), e=1.385, w=1.388, bire=0.0030. Colquiriite Uniaxial (-), e=1.391, w=1.406, bire=0.0150. Bararite Uniaxial (-), e=1.4, w=1.54, bire=0.1400. Thomasclarkite-(Y) ! Uniaxial (-), e=1.403, w=1.427, bire=0.0240. Rosenbergite Uniaxial (-), e=1.408, w=1.479, bire=0.0710. Zhemchuzhnikovite Uniaxial (-), e=1.417, w=1.515, bire=0.0980. Stepanovite Uniaxial (-), e=1.436, w=1.474, bire=0.0380. Humberstonite Uniaxial (+), w=1.439, e=1.482, bire=0.0430. Paceite ! Uniaxial (+), w=1.44, e=1.445, bire=0.0050. Schairerite Uniaxial (?), a=1.445, b=1.595, bire=0.1500. Butschliite Uniaxial (+), w=1.447, e=1.449, bire=0.0020. Galeite Uniaxial (-), e=1.447, w=1.502, bire=0.0550. Iquiqueite Uniaxial (+), w=1.449, e=1.502, bire=0.0530. Ungemachite Uniaxial (+), w=1.45, e=2.62, bire=1.1700. Covellite Uniaxial (-), e=1.4502, w=1.6052, bire=0.1550. Eitelite Uniaxial (-), e=1.459, w=1.504, bire=0.0450. Mcallisterite Uniaxial (-), e=1.459, w=1.525, bire=0.0660. Natrofairchildite Uniaxial (-), e=1.46, w=1.495, bire=0.0350. Acetamide Uniaxial (+), w=1.46, e=1.57, bire=0.1380-0.1750. Chrysocolla Uniaxial (+), w=1.46, e=1.478, bire=0.0180. Lannonite Uniaxial (+), w=1.46, e=1.47, bire=0.0100. Tincalconite Uniaxial (-), e=1.461, w=1.481, bire=0.0200. Hanksite Uniaxial (-), e=1.468, w=1.507, bire=0.0390. Thaumasite Uniaxial (+), w=1.469, e=1.502, bire=0.0330. Niveolanite ! Uniaxial (-), e=1.47, w=1.513, bire=0.0430. Archerite Uniaxial (-), e=1.47, w=1.491, bire=0.0210. Ettringite Uniaxial (-), e=1.471, w=1.477, bire=0.0060. Gmelinite-K ! Uniaxial (-), e=1.471, w=1.49, bire=0.0190. Loweite Uniaxial (+), w=1.471, e=1.472, bire=0.0010. Mazzite-Na ! Uniaxial (+), w=1.4711, e=1.474, bire=0.0191. Erionite-Ca ! Uniaxial (+), w=1.4711, e=1.474, bire=0.0191. Erionite-K ! Uniaxial (+), w=1.4711, e=1.474, bire=0.0191. Erionite-Na Uniaxial (+), w=1.472, e=1.492, bire=0.0200. Gagarinite-(Y) Uniaxial (+), w=1.472, e=1.502, bire=0.0300. Indigirite Uniaxial (-), e=1.475, w=1.492, bire=0.0170. Charlesite Uniaxial (-), e=1.471-1.479, w=1.474-1.481, bire=0.0020-0.0030. Herschelite ? Uniaxial (-), e=1.476, w=1.49, bire=0.0140. Wardsmithite Uniaxial (+/-), a=1.474-1.481, b=1.476-1.494, bire=0.0020-0.0130. Gmelinite-Ca ! Uniaxial (+/-), a=1.474-1.481, b=1.476-1.494, bire=0.0020-0.0130. Gmelinite-Na Uniaxial (+), w=1.478, e=1.484, bire=0.0060. Bentorite Uniaxial (-), e=1.478, w=1.532, bire=0.0540. Fairchildite Uniaxial (+), w=1.479, e=1.509, bire=0.0300. Carraraite ! Uniaxial (-), e=1.48, w=1.525, bire=0.0450. Biphosphammite Uniaxial (-), e=1.48, w=1.601, bire=0.1210. Grimselite Uniaxial (+), w=1.481, e=1.496, bire=0.0150. Tetranatrolite ? Uniaxial (-), e=1.482, w=1.493, bire=0.0110. Wermlandite Uniaxial (-), e=1.483, w=1.484, bire=0.0010. Tschernichite Uniaxial (+), w=1.483, e=1.503, bire=0.0200. Zajacite-(Ce) Uniaxial (+), w=1.484, e=1.603, bire=0.1190. Urea Uniaxial (-), e=1.485, w=1.58, bire=0.0950. Berborite Uniaxial (-), e=1.485, w=1.504, bire=0.0190. Kuzelite ! Uniaxial (-), e=1.486, w=1.64-1.66, bire=0.1540-0.1740. Calcite Uniaxial (-), e=1.486, w=1.505, bire=0.0190. Sacrofanite Uniaxial (-), e=1.4873, w=1.5109, bire=0.0236. Retgersite Uniaxial (+), w=1.488, e=1.5, bire=0.0120. Douglasite Uniaxial (+), w=1.487-1.491, e=1.492-1.499, bire=0.0050-0.0080. Aphthitalite Uniaxial (-), e=1.486-1.492, w=1.489-1.495, bire=0.0030. Offretite Uniaxial (-), e=1.49, w=1.509, bire=0.0190. Cancrisilite Uniaxial (+), w=1.491, e=1.507, bire=0.0160. Giuseppettite Uniaxial (-), e=1.488-1.495, w=1.49-1.507, bire=0.0020-0.0120. Vishnevite Uniaxial (-), e=1.494, w=1.501, bire=0.0070. Hydroxycancrinite Uniaxial (+), w=1.4941, e=1.496, bire=0.0019. Orschallite Uniaxial (-), e=1.487-1.502, w=1.489-1.51, bire=0.0020-0.0080. Levyne-Ca Uniaxial (-), e=1.487-1.502, w=1.489-1.51, bire=0.0020-0.0080. Levyne-Na ! Uniaxial (-), e=1.495, w=1.55, bire=0.0550. Antarcticite Uniaxial (+), w=1.495, e=1.497, bire=0.0020. Marinellite ! Uniaxial (+), w=1.496, e=1.502, bire=0.0060. Tugtupite Uniaxial (+), w=1.497, e=1.499, bire=0.0020. Alloriite ! Uniaxial (-), e=1.495-1.503, w=1.507-1.528, bire=0.0120-0.0250. Cancrinite Uniaxial (+), w=1.499, e=1.503, bire=0.0040. Farneseite ! Uniaxial (-), e=1.499, w=1.5062, bire=0.0072. Mazzite-Mg Uniaxial (-), e=1.5, w=1.679-1.681, bire=0.1790-0.1810. Dolomite Uniaxial (-), e=1.5, w=1.517, bire=0.0170. Meixnerite Uniaxial (+), w=1.5, e=1.515, bire=0.0150. Millosevichite Uniaxial (+), w=1.5, e=1.505, bire=0.0050. Sturmanite Uniaxial (-), e=1.497-1.506, w=1.506-1.53, bire=0.0090-0.0240. Slavikite Uniaxial (-), e=1.503, w=1.516, bire=0.0130. Arnhemite * Uniaxial (+), w=1.503, e=1.507, bire=0.0040. Chabazite-Sr ! Uniaxial (-), e=1.503, w=1.532, bire=0.0290. Micheelsenite ! Uniaxial (-), e=1.503, w=1.519, bire=0.0160. Teepleite Uniaxial (+), w=1.504, e=1.518, bire=0.0140. Mikasaite Uniaxial (-), e=1.506, w=1.508, bire=0.0020. Pitiglianoite Uniaxial (-), e=1.507, w=1.522, bire=0.0150. Bellbergite Uniaxial (-), e=1.507, w=1.56, bire=0.0530. Chloraluminite Uniaxial (+), w=1.509, e=1.526, bire=0.0170. Vlodavetsite ! Uniaxial (-), e=1.51, w=1.54, bire=0.0300. Brugnatellite Uniaxial (?), a=1.51, b=1.51, bire=0.0000. Chlorartinite ! Uniaxial (+), w=1.51, e=1.515, bire=0.0050. Francoanellite Uniaxial (+), w=1.51, e=1.512, bire=0.0020. Franzinite Uniaxial (-), e=1.51, w=1.524, bire=0.0140. Manasseite Uniaxial (-), e=1.51, w=1.536, bire=0.0260. Mineevite-(Y) Uniaxial (?), a=1.51, b=1.51, bire=0.0000. Motukoreaite Uniaxial (-), e=1.51, w=1.52, bire=0.0100. Mountkeithite Uniaxial (+), w=1.51, e=1.512, bire=0.0020. Thornasite Uniaxial (-), e=1.511, w=1.539, bire=0.0280. Mellite Uniaxial (+), w=1.5117, e=1.5224, bire=0.0107. Leifite Uniaxial (-), e=1.495-1.529, w=1.511-1.531, bire=0.0020-0.0160. Hydrotalcite Uniaxial (-), e=1.512, w=1.52, bire=0.0080. Tachyhydrite Uniaxial (-), e=1.513, w=1.535, bire=0.0220. Zemkorite Uniaxial (-), e=1.514, w=1.534, bire=0.0200. Zincaluminite Uniaxial (+), w=1.516, e=1.533, bire=0.0170. Felsobanyaite Uniaxial (+), w=1.516, e=1.542, bire=0.0260. Stichtite Uniaxial (+), w=1.515-1.519, e=1.515-1.519, bire=0.0000. Basaluminite ? Uniaxial (-), e=1.517, w=1.521, bire=0.0040. Carletonite Uniaxial (+), w=1.518, e=1.518, bire=0.0000. Ammonioleucite Uniaxial (-), e=1.519, w=1.694, bire=0.1750. Norsethite Uniaxial (+), w=1.52, e=1.54, bire=0.0200. Andersonite Uniaxial (+), w=1.518-1.522, e=1.517-1.527, bire=0.0010-0.0050. Davyne Uniaxial (+), w=1.52, e=1.55, bire=0.0300. Koenenite Uniaxial (-), w=1.52. Virgilite Uniaxial (+), w=1.521, e=1.529, bire=0.0080. Microsommite Uniaxial (+), w=1.522, e=1.552, bire=0.0300. Zirklerite Uniaxial (+), w=1.523, e=1.529, bire=0.0060. Afghanite Uniaxial (+), w=1.523, e=1.532, bire=0.0090. Buryatite ! Uniaxial (+), w=1.523, e=1.544, bire=0.0210. Weddellite Uniaxial (+), w=1.5235, e=1.529, bire=0.0055. Berlinite Uniaxial (+), w=1.525, e=1.525, bire=0.0000. Kalborsite Uniaxial (-), e=1.527, w=1.69, bire=0.1630. Benstonite Uniaxial (+), w=1.527, e=1.586, bire=0.0590. Eucryptite Uniaxial (-), e=1.527, w=1.532, bire=0.0050. Kaliophilite Uniaxial (-), e=1.527, w=1.67, bire=0.1430. Olekminskite Uniaxial (-), e=1.527, w=1.672, bire=0.1450. Paralstonite Uniaxial (+), w=1.527, e=1.535, bire=0.0080. Roggianite Uniaxial (-), e=1.528, w=1.53, bire=0.0020. Liottite Uniaxial (+), w=1.528, e=1.543, bire=0.0150. Tounkite Uniaxial (-), e=1.529, w=1.557, bire=0.0280. Barbertonite Uniaxial (+), w=1.529, e=1.532, bire=0.0030. Quadridavyne Uniaxial (-), e=1.51-1.55, w=1.69-1.75, bire=0.1800-0.2000. Ankerite Uniaxial (-), e=1.531, w=1.566, bire=0.0350. Hydroxylborite ! Uniaxial (-), e=1.531, w=1.538, bire=0.0070. Megakalsilite ! Uniaxial (-), e=1.532, w=1.534, bire=0.0020. Caminite Uniaxial (+), w=1.532, e=1.57, bire=0.0380. Fibroferrite Uniaxial (+), w=1.53-1.536, e=1.532-1.538, bire=0.0020. Apophyllite-(KF) Uniaxial (+), w=1.533, e=1.533, bire=0.0000. Quintinite-2H Uniaxial (+/-), a=1.533, b=1.533, bire=0.0000. Quintinite-3T Uniaxial (-), e=1.532-1.535, w=1.537-1.539, bire=0.0040-0.0050. Indialite Uniaxial (-), e=1.534, w=1.57, bire=0.0360. Fluoborite Uniaxial (-), e=1.534, w=1.542, bire=0.0080. Karchevskyite ! Uniaxial (-), w=1.534. Stratlingite Uniaxial (-), e=1.532-1.537, w=1.538-1.543, bire=0.0060. Kalsilite Uniaxial (+), w=1.535, e=1.537, bire=0.0020. Apophyllite * Uniaxial (-), e=1.535, w=1.727, bire=0.1920. Kutnohorite Uniaxial (-), e=1.535, w=1.54, bire=0.0050. Panunzite Uniaxial (-), e=1.535, w=1.555, bire=0.0200. Woodallite ! Uniaxial (-), e=1.535, w=1.565, bire=0.0300. Zakharovite Uniaxial (+), w=1.536, e=1.545, bire=0.0090. Ashcroftine-(Ce) * Uniaxial (-), e=1.528-1.544, w=1.531-1.549, bire=0.0030-0.0050. Nepheline Uniaxial (+), w=1.536, e=1.544, bire=0.0080. Yagiite Uniaxial (+), w=1.536-1.537, e=1.545-1.549, bire=0.0090-0.0120. Ashcroftine-(Y) Uniaxial (-), e=1.537, w=1.539, bire=0.0020. Marialite Uniaxial (-), e=1.537, w=1.548, bire=0.0110. Reederite-(Y) ! Uniaxial (+), w=1.537, e=1.542, bire=0.0050. Roedderite Uniaxial (-), e=1.538, w=1.542, bire=0.0040. Arsenuranospathite Uniaxial (-), e=1.533-1.543, w=1.543-1.561, bire=0.0100-0.0180. Iowaite Uniaxial (+), w=1.538, e=1.563, bire=0.0250. Sheldrickite ! Uniaxial (-), e=1.5382, w=1.5607, bire=0.0225. Gordaite ! Uniaxial (-), e=1.529-1.548, w=1.532-1.551, bire=0.0030-0.0160. Milarite Uniaxial (-), e=1.54, w=1.56, bire=0.0200. Carrboydite Uniaxial (+), w=1.54, e=1.56, bire=0.0200. Chlormagaluminite Uniaxial (-), e=1.54, w=1.556, bire=0.0160. Jouravskite Uniaxial (?), a=1.54, b=1.54, bire=0.0000. Sinjarite Uniaxial (+), w=1.5406, e=1.543, bire=0.0024. Osumilite-(Mg) Uniaxial (+), w=1.542, e=1.543, bire=0.0010. Apophyllite-(KOH) Uniaxial (-), e=1.542, w=1.728, bire=0.1860. Lukechangite-(Ce) ! Uniaxial (-), e=1.542, w=1.568, bire=0.0260. Theresemagnanite Uniaxial (-), e=1.543, w=1.564, bire=0.0210. Pyroaurite Uniaxial (+), w=1.543-1.5445, e=1.5443-1.5458, bire=0.0013. Eifelite Uniaxial (-), e=1.544, w=1.584, bire=0.0400. Guarinoite Uniaxial (+), w=1.543-1.545, e=1.552-1.554, bire=0.0090. Quartz Uniaxial (+), w=1.545, e=1.59, bire=0.0450. Monohydrocalcite Uniaxial (?), b=1.532-1.558. Zincowoodwardite ! Uniaxial (+), w=1.545-1.547, e=1.549-1.551, bire=0.0040. Osumilite-(Fe) Uniaxial (-), w=1.546. Shigaite Uniaxial (-), e=1.522-1.571, w=1.534-1.607, bire=0.0120-0.0360. Scapolite * Uniaxial (-), e=1.547, w=1.587, bire=0.0400. Charmarite-2H Uniaxial (-), e=1.547, w=1.587, bire=0.0400. Charmarite-3T Uniaxial (-), e=1.547, w=1.569, bire=0.0220. Desautelsite Uniaxial (-), e=1.547, w=1.574, bire=0.0270. Portlandite Uniaxial (+), w=1.549, e=1.565, bire=0.0160. Hydrowoodwardite ! Uniaxial (-), e=1.549, w=1.569, bire=0.0200. Kalistrontite Uniaxial (-), e=1.549, w=1.561, bire=0.0120. Lovozerite Uniaxial (+), w=1.55, e=1.57, bire=0.0200. Bassanite Uniaxial (+), w=1.55, e=1.557, bire=0.0070. Coquimbite Uniaxial (-), e=1.55, w=1.75, bire=0.2000. Minrecordite Uniaxial (+), w=1.55, e=1.555, bire=0.0050. Paracoquimbite Uniaxial (-), e=1.55, w=1.573, bire=0.0230. Sjogrenite Uniaxial (+), w=1.55, e=1.65, bire=0.1000. Vaterite Uniaxial (+), w=1.551, e=1.559, bire=0.0080. Tiptopite Uniaxial (+), w=1.552, e=1.561, bire=0.0090. Friedrichbeckeite ! Uniaxial (-), e=1.552, w=1.53, bire=0.0220. Truscottite Uniaxial (+), w=1.553, e=1.573, bire=0.0200. Formicaite ! Uniaxial (-), e=1.553, w=1.556, bire=0.0030. Oftedalite ! Uniaxial (-), e=1.554, w=1.612, bire=0.0580. Diomignite Uniaxial (-), e=1.55-1.56, w=1.58-1.6, bire=0.0300-0.0400. Meionite Uniaxial (?), a=1.556, b=1.567, bire=0.0110. Aliettite Uniaxial (+), w=1.556, e=1.645, bire=0.0890. Julienite * Uniaxial (-), e=1.558, w=1.585, bire=0.0270. Silvialite ! Uniaxial (?), b=1.558. Zincowoodwardite-1T ! Uniaxial (-), e=1.559, w=1.56, bire=0.0010. Almarudite ! Uniaxial (+), w=1.559, e=1.627, bire=0.0680. Ferrinatrite Uniaxial (-), e=1.559, w=1.578, bire=0.0190. Sodium meta-autunite ! Uniaxial (-), e=1.559, w=1.578, bire=0.0190. Sodium-autunite Uniaxial (-), e=1.56, w=1.572, bire=0.0120. Barium-zinc-alumopharmacosiderite * Uniaxial (+), w=1.56, e=1.58, bire=0.0200. Brucite Uniaxial (-), e=1.56, w=1.58, bire=0.0200. Meta-ankoleite Uniaxial (-), w=1.56. Nikischerite ! Uniaxial (-), e=1.558-1.563, w=1.5558-1.563, bire=0.0000-0.0022. Reyerite Uniaxial (+), w=1.561, e=1.563, bire=0.0020. Shibkovite ! Uniaxial (+), w=1.562, e=1.531, bire=0.0310. Telyushenkoite ! Uniaxial (-), e=1.552-1.575, w=1.618-1.632, bire=0.0570-0.0660. Chalcophyllite Uniaxial (-), w=1.5636. Zincowoodwardite-3R ! Uniaxial (-), e=1.564, w=1.57, bire=0.0060. Cesanite Uniaxial (+), w=1.564, e=1.577, bire=0.0130. Perhamite Uniaxial (-), e=1.56-1.569, w=1.565-1.577, bire=0.0050-0.0080. Zeophyllite Uniaxial (+), w=1.565, e=1.575, bire=0.0100. Pinnoite Uniaxial (-), e=1.565, w=1.745, bire=0.1800. Zhonghuacerite-(Ce) Uniaxial (-), e=1.566, w=1.567, bire=0.0010. Brannockite Uniaxial (-), e=1.568, w=1.579, bire=0.0110. Chernikovite Uniaxial (-), e=1.568, w=1.58, bire=0.0120. Ekanite Uniaxial (+), w=1.568, e=1.59, bire=0.0220. Natroalunite Uniaxial (+), w=1.569, e=1.571, bire=0.0020. Aqualite ! Uniaxial (-), e=1.569, w=1.57, bire=0.0010. Brandholzite ! Uniaxial (+), w=1.569, e=1.581, bire=0.0120. Schaurteite Uniaxial (-), e=1.57, w=1.597, bire=0.0270. Abernathyite Uniaxial (+/-), a=1.57, b=1.57, bire=0.0000. Bariopharmacosiderite Uniaxial (-), e=1.57, w=1.599, bire=0.0290. Caresite Uniaxial (-), e=1.57, w=1.587, bire=0.0170. Shafranovskite Uniaxial (+), w=1.56-1.58, e=1.62-1.64, bire=0.0600. Yoshiokaite Uniaxial (?), a=1.571, b=1.581, bire=0.0100. Sergeevite Uniaxial (+), w=1.572, e=1.592, bire=0.0200. Alunite Uniaxial (-), e=1.572, w=1.646, bire=0.0740. Ewaldite Uniaxial (+), w=1.572, e=1.581, bire=0.0090. Godovikovite Uniaxial (-), e=1.572, w=1.573, bire=0.0010. Steacyite Uniaxial (-), e=1.573, w=1.605, bire=0.0320. Heinrichite Uniaxial (+), w=1.573, e=1.599, bire=0.0260. Tunisite Uniaxial (-), e=1.574, w=1.577, bire=0.0030. Ekaterinite Uniaxial (+), w=1.574, e=1.587, bire=0.0130. Tuliokite Uniaxial (+), w=1.575, e=1.578, bire=0.0030. Chayesite Uniaxial (-), e=1.56-1.59, w=1.588-1.635, bire=0.0280-0.0450. Coalingite Uniaxial (-), e=1.575, w=1.58, bire=0.0050. Darapiosite Uniaxial (+), w=1.575, e=1.58, bire=0.0050. Dmisteinbergite Uniaxial (-), e=1.559-1.592, w=1.57, bire=0.0110-0.0220. Merrihueite Uniaxial (-), e=1.576, w=1.576, bire=0.0000. Lawrencite Uniaxial (-), e=1.577, w=1.578, bire=0.0010. Arctite Uniaxial (+), w=1.577, e=1.584, bire=0.0070. Kafehydrocyanite * Uniaxial (-), e=1.573-1.581, w=1.588-1.595, bire=0.0140-0.0150. Metavoltine Uniaxial (?), b=1.577. Namuwite Uniaxial (+), w=1.578, e=1.595, bire=0.0170. Sabieite Uniaxial (-), e=1.578, w=1.585, bire=0.0070. Sazykinaite-(Y) Uniaxial (-), e=1.564-1.595, w=1.568-1.602, bire=0.0040-0.0070. Beryl Uniaxial (-), e=1.581, w=1.803, bire=0.2220. Leisingite ! Uniaxial (-), e=1.582, w=1.591, bire=0.0090. Malinkoite ! Uniaxial (-), e=1.582, w=1.592, bire=0.0100. Torbernite Uniaxial (+), w=1.58-1.585, e=1.64-1.65, bire=0.0600-0.0650. Cacoxenite Uniaxial (+), w=1.583, e=1.695, bire=0.1120. Piypite Uniaxial (-), e=1.58-1.587, w=1.33-1.336, bire=0.2500-0.2510. Nitratine Uniaxial (+), w=1.584, e=1.66, bire=0.0760. Bystrite Uniaxial (-), e=1.585, w=1.59, bire=0.0050. Iraqite-(La) Uniaxial (-), e=1.585, w=1.593, bire=0.0080. Machatschkiite Uniaxial (-), e=1.585, w=1.612, bire=0.0270. Natrouranospinite Uniaxial (-), e=1.585, w=1.63, bire=0.0450. Trogerite Uniaxial (-), e=1.586, w=1.589, bire=0.0030. Abenakiite-(Ce) Uniaxial (-), e=1.586, w=1.59, bire=0.0040. Dusmatovite Uniaxial (-), e=1.586, w=1.59, bire=0.0040. Pertlikite ! Uniaxial (-), e=1.586, w=1.589, bire=0.0030. Trattnerite ! Uniaxial (-), w=1.586. Tungusite Uniaxial (+), w=1.588, e=1.612, bire=0.0240. Blatonite ! Uniaxial (+), w=1.588, e=1.604, bire=0.0160. Walthierite Uniaxial (-), e=1.588-1.589, w=1.606-1.609, bire=0.0180-0.0200. Phosphoellenbergerite ! Uniaxial (+), w=1.5886, e=1.5894, bire=0.0008. Rinneite Uniaxial (-), e=1.589, w=1.596, bire=0.0070. Wenkite Uniaxial (+), w=1.59, e=1.602, bire=0.0120. Ammonioalunite Uniaxial (+), w=1.59, e=1.59, bire=0.0000. Chlormanganokalite Uniaxial (-), e=1.59, w=1.675, bire=0.0850. Chloromagnesite * Uniaxial (-), e=1.59, w=1.633, bire=0.0430. Cuprorivaite Uniaxial (-), e=1.59, w=1.63, bire=0.0400. Hydrohonessite Uniaxial (-), e=1.584-1.596, w=1.604-1.607, bire=0.0110-0.0200. Meta-autunite Uniaxial (-), e=1.59, w=1.63, bire=0.0400. Wesselsite ! Uniaxial (-), e=1.59-1.592, w=1.624, bire=0.0320-0.0340. Tisinalite Uniaxial (-), e=1.59-1.592, w=1.624, bire=0.0320-0.0340. Zirsinalite Uniaxial (-), e=1.577-1.607, w=1.579-1.611, bire=0.0020-0.0040. Sugilite Uniaxial (-), e=1.593, w=1.633, bire=0.0400. Effenbergerite Uniaxial (+), w=1.59-1.597, e=1.599-1.607, bire=0.0090-0.0100. Wardite Uniaxial (-), e=1.594, w=1.642, bire=0.0480. Kampfite ! Uniaxial (-), e=1.595, w=1.617, bire=0.0220. Karnasurtite-(Ce) Uniaxial (-), e=1.595, w=1.632, bire=0.0370. Metanovacekite Uniaxial (+), w=1.596, e=1.608, bire=0.0120. Alarsite ! Uniaxial (-), e=1.596, w=1.609, bire=0.0130. Hilairite Uniaxial (+), w=1.596, e=1.604, bire=0.0080. Jaffeite Uniaxial (-), e=1.597, w=1.599, bire=0.0020. Holtedahlite Uniaxial (+), w=1.597, e=1.601, bire=0.0040. Labyrinthite ! Uniaxial (-), e=1.596-1.598, w=1.814-1.816, bire=0.2180. Rhodochrosite Uniaxial (+), e=1.597. Schlossmacherite Uniaxial (+), w=1.598, e=1.598, bire=0.0000. Combeite Uniaxial (-), w=1.598. Orlymanite Uniaxial (+), w=1.598, e=1.6, bire=0.0020. Rastsvetaevite ! Uniaxial (-), e=1.598, w=1.601, bire=0.0030. Strontiowhitlockite Uniaxial (-), e=1.598, w=1.605, bire=0.0070. Takovite Uniaxial (-), e=1.5984, w=1.775, bire=0.1766. Cordylite-(Ce) Uniaxial (-), e=1.576-1.623, w=1.585-1.643, bire=0.0090-0.0200. Zeunerite Uniaxial (+), w=1.6, e=1.605, bire=0.0050. Bottinoite Uniaxial (-), e=1.6, w=1.62, bire=0.0200. Chladniite Uniaxial (-), e=1.6, w=1.619, bire=0.0190. Coombsite ! Uniaxial (-), w=1.6. Molysite Uniaxial (-), e=1.6, w=1.885, bire=0.2850. Sphaerocobaltite Uniaxial (-), e=1.57-1.633, w=1.785-1.875, bire=0.2150-0.2420. Siderite Uniaxial (-), e=1.602, w=1.607, bire=0.0050. Jamborite Uniaxial (+), w=1.603, e=1.639, bire=0.0360. Calciocatapleiite Uniaxial (-), e=1.603, w=1.609, bire=0.0060. Fluocerite-(La) Uniaxial (-), e=1.603, w=1.765, bire=0.1620. Huanghoite-(Ce) Uniaxial (-), e=1.604, w=1.607, bire=0.0030. Minehillite Uniaxial (+), w=1.604, e=1.615, bire=0.0110. Sarcolite Uniaxial (-), e=1.605, w=1.626, bire=0.0210. Bazzite Uniaxial (-), e=1.605, w=1.614, bire=0.0090. Mopungite Uniaxial (-), e=1.601-1.611, w=1.612-1.62, bire=0.0090-0.0110. Pezzottaite ! Uniaxial (+), w=1.606, e=1.62, bire=0.0140. Saryarkite-(Y) Uniaxial (-), e=1.606, w=1.608, bire=0.0020. Sogdianite Uniaxial (-), e=1.606, w=1.611, bire=0.0050. Turkestanite ! Uniaxial (-), e=1.607, w=1.612, bire=0.0050. Pyatenkoite-(Y) ! Uniaxial (+), w=1.606-1.61, e=1.61-1.613, bire=0.0030-0.0040. Eudialyte Uniaxial (-), e=1.608, w=1.642, bire=0.0340. Metakahlerite Uniaxial (+), w=1.608, e=1.611, bire=0.0030. Raslakite ! Uniaxial (-), e=1.598-1.619, w=1.603-1.628, bire=0.0050-0.0090. Carbonate-hydroxylapatite ? Uniaxial (-), e=1.608-1.609, w=1.637-1.641, bire=0.0290-0.0320. Metaheinrichite Uniaxial (-), e=1.609, w=1.708, bire=0.0990. Daqingshanite-(Ce) Uniaxial (-), e=1.607-1.611, w=1.612-1.618, bire=0.0050-0.0070. Fluocerite-(Ce) Uniaxial (+), w=1.609, e=1.63, bire=0.0210. Narsarsukite Uniaxial (-), e=1.609-1.61, w=1.62-1.623, bire=0.0110-0.0130. Khanneshite Uniaxial (-), e=1.61, w=1.615, bire=0.0050. Arapovite ! Uniaxial (+), w=1.61, e=1.613, bire=0.0030. Dualite ! Uniaxial (-), e=1.61, w=1.83, bire=0.2200. Gaspeite Uniaxial (+), w=1.61, e=1.619, bire=0.0090. Voronkovite ! Uniaxial (-), e=1.611, w=1.705, bire=0.0940. Bechererite ! Uniaxial (-), e=1.611, w=1.618, bire=0.0070. Mogovidite ! Uniaxial (+), w=1.612, e=1.615, bire=0.0030. Ikranite ! Uniaxial (?), a=1.615, b=1.627, bire=0.0120. Burbankite Uniaxial (-), e=1.615, w=1.622, bire=0.0070. Fuenzalidaite Uniaxial (?), a=1.615, b=1.635, bire=0.0200. Honessite Uniaxial (-), e=1.615, w=1.637, bire=0.0220. Mitscherlichite Uniaxial (-), e=1.6155, w=1.6785, bire=0.0630. Carbonate-fluorapatite ? Uniaxial (-), e=1.616, w=1.62, bire=0.0040. Feklichevite ! Uniaxial (-), e=1.617, w=1.644, bire=0.0270. Metakirchheimerite Uniaxial (+), w=1.618, e=1.626, bire=0.0080. Alluaivite Uniaxial (+), w=1.618, e=1.623, bire=0.0050. Crandallite Uniaxial (+), w=1.618, e=1.63, bire=0.0120. Gainesite Uniaxial (-), e=1.618, w=1.628, bire=0.0100. Golyshevite ! Uniaxial (+), w=1.618, e=1.625, bire=0.0070. Gorceixite Uniaxial (-), e=1.6186, w=1.6221, bire=0.0035. Ferrokentbrooksite ! Uniaxial (-), e=1.619, w=1.622, bire=0.0030. Calciohilairite Uniaxial (-), e=1.619, w=1.621, bire=0.0020. Gillespite Uniaxial (-), e=1.619, w=1.623, bire=0.0040. Olgite ? Uniaxial (-), e=1.619, w=1.625, bire=0.0060. Stoppaniite ! Uniaxial (+), w=1.62, e=1.63, bire=0.0100. Goyazite Uniaxial (-), e=1.62, w=1.623, bire=0.0030. Merrillite Uniaxial (-), e=1.62, w=1.623, bire=0.0030. Merrillite-(Ca) * Uniaxial (-), e=1.62, w=1.623, bire=0.0030. Merrillite-(Y) * Uniaxial (-), e=1.612-1.63, w=1.631-1.655, bire=0.0190-0.0250. Dravite ! Uniaxial (-), e=1.621, w=1.637, bire=0.0160. Liddicoatite ! Uniaxial (+), w=1.6215, e=1.625, bire=0.0035. Stornesite-(Y) ! Uniaxial (-), e=1.622, w=1.708, bire=0.0860. Scacchite Uniaxial (-), e=1.62-1.625, w=1.62-1.641, bire=0.0000-0.0160. Novacekite Uniaxial (-), e=1.623, w=1.628, bire=0.0050. Bario-olgite ! Uniaxial (-), e=1.623, w=1.628, bire=0.0050. Kentbrooksite ! Uniaxial (-), e=1.623, w=1.64, bire=0.0170. Schulenbergite Uniaxial (-), e=1.623, w=1.64, bire=0.0170. Zn-Schulenbergite ! Uniaxial (-), e=1.623, w=1.643, bire=0.0200. Zussmanite Uniaxial (-), e=1.615-1.632, w=1.635-1.65, bire=0.0180-0.0200. Elbaite ! Uniaxial (-), e=1.624, w=1.646, bire=0.0220. Hydroxyuvite ! Uniaxial (-), e=1.624, w=1.65, bire=0.0260. Magnesiofoitite ! Uniaxial (+), w=1.624, e=1.626, bire=0.0020. Metatorbernite Uniaxial (-), e=1.624, w=1.645, bire=0.0210. Rossmanite ! Uniaxial (+), w=1.624, e=1.636, bire=0.0120. Selwynite Uniaxial (-), e=1.624-1.626, w=1.635, bire=0.0090-0.0110. Alumoakermanite ! Uniaxial (?), a=1.625, b=1.625, bire=0.0000. Arsenocrandallite Uniaxial (-), e=1.625, w=1.85, bire=0.2250. Smithsonite Uniaxial (-), e=1.6254, w=1.6279, bire=0.0025. Khomyakovite ! Uniaxial (+), w=1.624-1.627, e=1.653-1.658, bire=0.0290-0.0310. Wadeite Uniaxial (-), e=1.626, w=1.629, bire=0.0030. Manganokhomyakovite ! Uniaxial (-), e=1.626, w=1.65, bire=0.0240. Metazeunerite Uniaxial (-), e=1.626, w=1.629, bire=0.0030. Whitlockite Uniaxial (+), w=1.627, e=1.645, bire=0.0180. Bobtraillite ! Uniaxial (-), e=1.627, w=1.663, bire=0.0360. Kamphaugite-(Y) Uniaxial (-), e=1.628, w=1.635, bire=0.0070. Sweetite Uniaxial (+), w=1.629, e=1.639, bire=0.0100. Ashoverite Uniaxial (+), w=1.629, e=1.632, bire=0.0030. Babefphite Uniaxial (-), e=1.629, w=1.629, bire=0.0000. Kamaishilite Uniaxial (-), e=1.63, w=1.633, bire=0.0030. Apatite * Uniaxial (-), e=1.63, w=1.635, bire=0.0050. Berezanskite ! Uniaxial (+/-), a=1.63, b=1.633, bire=0.0030. Burtite Uniaxial (+), w=1.63, e=1.638, bire=0.0080. Hauckite Uniaxial (-), e=1.63, w=1.726, bire=0.0960. Takedaite Uniaxial (-), e=1.631, w=1.84, bire=0.2090. Brizziite-III Uniaxial (-), e=1.631, w=1.84, bire=0.2090. Brizziite-VII Uniaxial (-), e=1.631, w=1.636, bire=0.0050. Calcioburbankite Uniaxial (+), w=1.631, e=1.652, bire=0.0210. Faheyite Uniaxial (-), e=1.631, w=1.639, bire=0.0080. Georgbarsanovite ! Uniaxial (-), e=1.625-1.638, w=1.648-1.65, bire=0.0120-0.0230. Kazakovite Uniaxial (+), w=1.632, e=1.64, bire=0.0080. Akermanite Uniaxial (-), e=1.632, w=1.634, bire=0.0020. Kahlerite Uniaxial (-), e=1.592-1.672, w=1.611-1.664, bire=0.0080-0.0190. Meliphanite Uniaxial (-), e=1.6325, w=1.63, bire=0.0025. Apatite-(CaF) Uniaxial (+), w=1.631-1.635, e=1.646-1.649, bire=0.0140-0.0150. Svanbergite Uniaxial (+), w=1.634, e=1.645, bire=0.0110. Mccrillisite Uniaxial (-), e=1.635, w=1.653, bire=0.0180. Belovite-(La) ! Uniaxial (-), e=1.635, w=1.645, bire=0.0100. Carbokentbrooksite ! Uniaxial (-), e=1.635, w=1.686, bire=0.0510. Mahnertite ! Uniaxial (-), e=1.635, w=1.654, bire=0.0190. Olenite ! Uniaxial (-), e=1.635, w=1.668, bire=0.0330. Rorisite Uniaxial (-), e=1.635, w=1.646, bire=0.0110. Zapatalite Uniaxial (+), w=1.636, e=1.647, bire=0.0110. Woodhouseite Uniaxial (-), e=1.633-1.64, w=1.66-1.672, bire=0.0270-0.0320. Schorl ! Uniaxial (-), e=1.637, w=1.647, bire=0.0100. Aminoffite Uniaxial (-), e=1.637, w=1.651, bire=0.0140. Apatite-(SrOH) Uniaxial (-), e=1.637, w=1.649, bire=0.0120. Fluorcaphite ! Uniaxial (-), e=1.637, w=1.648, bire=0.0110. Johnsenite-(Ce) ! Uniaxial (-), e=1.637, w=1.648, bire=0.0110. Zirsilite-(Ce) ! Uniaxial (-), e=1.615-1.66. Eylettersite Uniaxial (-), e=1.6378, w=1.6494, bire=0.0116. Taseqite ! Uniaxial (-), e=1.638, w=1.688, bire=0.0500. Astrocyanite-(Ce) Uniaxial (-), e=1.639, w=1.646, bire=0.0070. Kellyite Uniaxial (?), a=1.64, b=1.64, bire=0.0000. Arsenogoyazite Uniaxial (-), e=1.64, w=1.66, bire=0.0200. Belovite-(Ce) Uniaxial (+), w=1.64, e=1.663, bire=0.0230. IMA2003-019 ! Uniaxial (-), e=1.64, w=1.653, bire=0.0130. Jeremejevite Uniaxial (-), e=1.64, w=1.68, bire=0.0400. Pyrosmalite-(Fe) Uniaxial (-), e=1.64, w=1.68, bire=0.0400. Pyrosmalite-(Mn) Uniaxial (+), w=1.64, e=1.655, bire=0.0150. Reidite ! Uniaxial (-), e=1.6406, w=1.645, bire=0.0044. Oneillite ! Uniaxial (?), a=1.641, b=1.691, bire=0.0500. Bandylite Uniaxial (-), e=1.641, w=1.694, bire=0.0530. Spangolite Uniaxial (-), e=1.642, w=1.655, bire=0.0130. Carlosruizite Uniaxial (-), e=1.642, w=1.653, bire=0.0110. Chantalite Uniaxial (-), e=1.642, w=1.664, bire=0.0220. Foitite ! Uniaxial (-), e=1.626-1.658, w=1.632-1.669, bire=0.0060-0.0110. Melilite Uniaxial (-), e=1.644, w=1.651, bire=0.0070. Apatite-(CaOH) Uniaxial (-), e=1.644, w=1.672, bire=0.0280. Cualstibite Uniaxial (-), e=1.644, w=1.671, bire=0.0270. Komkovite Uniaxial (+), w=1.644, e=1.664, bire=0.0200. Tristramite Uniaxial (-), e=1.645, w=1.645, bire=0.0000. Arsenogorceixite ! Uniaxial (-), e=1.645, w=1.751, bire=0.1060. Claraite Uniaxial (+), w=1.646, e=1.647, bire=0.0010. Braitschite-(Ce) Uniaxial (-), e=1.647, w=1.749, bire=0.1020. Lemanskiite ! Uniaxial (-), e=1.648, w=1.6918, bire=0.0438. Wickenburgite Uniaxial (-), e=1.649-1.65, w=1.652-1.655, bire=0.0030-0.0050. Ellestadite-(Cl) Uniaxial (-), e=1.65, w=1.655, bire=0.0050. Ellestadite-(F) Uniaxial (-), e=1.65, w=1.654, bire=0.0040. Ellestadite-(OH) Uniaxial (+), w=1.65, e=1.69, bire=0.0400. Kambaldaite Uniaxial (-), e=1.65, w=1.735, bire=0.0850. Reevesite Uniaxial (-), e=1.65, w=1.67, bire=0.0200. Uvite ! Uniaxial (+), w=1.644-1.658, e=1.697-1.709, bire=0.0510-0.0530. Dioptase Uniaxial (?), a=1.649-1.653, b=1.649-1.653, bire=0.0000. Harkerite Uniaxial (-), e=1.652, w=1.656, bire=0.0040. Zhangpeishanite ! Uniaxial (+), w=1.653, e=1.675, bire=0.0220. Plumbogummite Uniaxial (-), e=1.653, w=1.666, bire=0.0130. Tienshanite Uniaxial (+), w=1.654, e=1.67, bire=0.0160. Phenakite Uniaxial (+), w=1.654, e=1.703, bire=0.0490. Rhabdophane-(La) Uniaxial (-), e=1.655, w=1.735, bire=0.0800. Buergerite ! Uniaxial (-), e=1.655, w=1.66, bire=0.0050. Fermorite Uniaxial (+/-), a=1.655, b=1.655, bire=0.0000. Johnsomervilleite Uniaxial (-), e=1.655, w=1.68, bire=0.0250. Sincosite Uniaxial (+), w=1.656, e=1.682, bire=0.0260. Despujolsite Uniaxial (+), w=1.656, e=1.682, bire=0.0260. Kosnarite Uniaxial (-), e=1.656, w=1.671, bire=0.0150. Sterlinghillite Uniaxial (+), w=1.657, e=1.7, bire=0.0430. Simonkolleite Uniaxial (-), e=1.66, w=1.682, bire=0.0220. Deloneite-(Ce) ! Uniaxial (-), e=1.66, w=1.67, bire=0.0100. Gehlenite Uniaxial (?), a=1.66, b=1.69, bire=0.0300. Grayite Uniaxial (-), e=1.66, w=1.778, bire=0.1180. Nordenskioldine Uniaxial (-), e=1.661, w=1.672, bire=0.0110. Hardystonite Uniaxial (-), e=1.66-1.663, w=1.665-1.668, bire=0.0050. Steenstrupine-(Ce) Uniaxial (-), e=1.6538-1.6697, w=1.6553-1.6789, bire=0.0015-0.0092. Ellenbergerite Uniaxial (+), w=1.662, e=1.663, bire=0.0010. Cahnite Uniaxial (+), w=1.662, e=1.756, bire=0.0940. Rontgenite-(Ce) Uniaxial (-), e=1.663, w=1.6876, bire=0.0246. Diaoyudaoite Uniaxial (+), w=1.664, e=1.672, bire=0.0080. Gugiaite Uniaxial (+), w=1.666, e=1.747, bire=0.0810. Petersite-(Y) Uniaxial (-), e=1.6675, w=1.675, bire=0.0075. Apatite-(CaCl) Uniaxial (-), e=1.668, w=1.684, bire=0.0160. Trembathite Uniaxial (-), e=1.669, w=1.687, bire=0.0180. Feruvite ! Uniaxial (-), e=1.669, w=1.694, bire=0.0250. Kuannersuite-(Ce) ! Uniaxial (-), e=1.67, w=1.7, bire=0.0300. Okayamalite ! Uniaxial (+), w=1.67, e=1.691, bire=0.0210. Orpheite Uniaxial (+), w=1.67-1.671, e=1.689-1.7, bire=0.0190-0.0290. Hinsdalite Uniaxial (+), w=1.671, e=1.676, bire=0.0010. Fillowite Uniaxial (+), w=1.672, e=1.751, bire=0.0790. Qaqarssukite-(Ce) ! Uniaxial (-), e=1.672, w=1.683, bire=0.0110. Verplanckite Uniaxial (+), w=1.674, e=1.739-1.75, bire=0.0650-0.0760. Calciopetersite ! Uniaxial (-), e=1.674, w=1.685, bire=0.0110. Pabstite Uniaxial (+), w=1.674, e=1.77, bire=0.0960. Synchysite-(Ce) Uniaxial (+), e=1.67-1.678. Thorbastnasite Uniaxial (+), w=1.676, e=1.757, bire=0.0810. Parisite-(Ce) Uniaxial (+), w=1.6751-1.6813, e=1.685-1.691, bire=0.0097-0.0099. Bazirite Uniaxial (+), w=1.679, e=1.754, bire=0.0750. Parisite-(Nd) Uniaxial (-), e=1.679, w=1.704, bire=0.0250. Schallerite Uniaxial (+), w=1.68, e=1.695, bire=0.0150. Brockite Uniaxial (-), e=1.68, w=1.756, bire=0.0760. Natisite Uniaxial (-), e=1.684, w=1.69, bire=0.0060. Comblainite Uniaxial (-), e=1.684, w=1.687, bire=0.0030. Johnbaumite Uniaxial (+), w=1.688, e=1.744, bire=0.0560. Rhabdophane-(Ce) Uniaxial (-), e=1.688, w=1.698, bire=0.0100. Weilerite Uniaxial (+), w=1.688, e=1.765, bire=0.0770. Zalesiite ! Uniaxial (+), w=1.689, e=1.695, bire=0.0060. Ilimaussite-(Ce) Uniaxial (+), w=1.694, e=1.701, bire=0.0070. Florencite-(La) Uniaxial (+), w=1.697, e=1.704, bire=0.0070. Muirite Uniaxial (-), e=1.698, w=1.706, bire=0.0080. Svabite Uniaxial (-), e=1.699, w=1.702, bire=0.0030. Fluorvesuvianite ! Uniaxial (-), e=1.7, w=1.7, bire=0.0000. Alforsite Uniaxial (-), e=1.7, w=1.508-1.51, bire=0.1900-0.1920. Magnesite Uniaxial (-), e=1.7, w=1.718, bire=0.0180. Nelenite Uniaxial (-), e=1.7, w=1.708, bire=0.0080. Turneaureite Uniaxial (+), w=1.701, e=1.782, bire=0.0810. Agardite-(Y) Uniaxial (+), w=1.701, e=1.707, bire=0.0060. Kemmlitzite Uniaxial (+), w=1.701, e=1.706, bire=0.0050. Tuite ! Uniaxial (-), e=1.702, w=1.714, bire=0.0120. Traskite Uniaxial (+), w=1.703, e=1.711, bire=0.0080. Peprossiite-(Ce) Uniaxial (+), w=1.704, e=1.765, bire=0.0610. Goudeyite Uniaxial (-), e=1.705, w=1.93, bire=0.2250. Berndtite Uniaxial (+), w=1.705, e=1.708, bire=0.0030. Diversilite-(Ce) ! Uniaxial (-), e=1.705, w=1.785, bire=0.0800. Juanitaite ! Uniaxial (+), w=1.691-1.72, e=1.719-1.73, bire=0.0100-0.0280. Willemite Uniaxial (+), w=1.707, e=1.722, bire=0.0150. Amakinite Uniaxial (-), e=1.7-1.717, w=1.751-1.76, bire=0.0430-0.0510. Wiserite Uniaxial (+), w=1.709, e=1.86, bire=0.1510. Pretulite ! Uniaxial (-), e=1.71, w=1.753, bire=0.0430. Haydeeite ! Uniaxial (-), e=1.71, w=1.77, bire=0.0600. Zdenekite Uniaxial (-), e=1.711, w=1.723, bire=0.0120. Fencooperite ! Uniaxial (-), w=1.712. Palmierite Uniaxial (?), b=1.713. Hidalgoite Uniaxial (-), e=1.714, w=1.733, bire=0.0190. Hematolite Uniaxial (-), e=1.713-1.715, w=1.815-1.82, bire=0.1020-0.1050. Jarosite Uniaxial (+), w=1.714, e=1.731, bire=0.0170. Osarizawaite Uniaxial (-), e=1.715, w=1.721, bire=0.0060. Bariosincosite ! Uniaxial (+), w=1.715, e=1.81, bire=0.0950. Hydroxylbastnasite-(Nd) Uniaxial (+), w=1.715, e=1.728, bire=0.0130. Jasmundite Uniaxial (+), w=1.715, e=1.802, bire=0.0870. Xenotime-(Yb) ! Uniaxial (+), w=1.717, e=1.818, bire=0.1010. Bastnasite-(Ce) Uniaxial (+), w=1.717, e=1.818, bire=0.1010. Bastnasite-(La) Uniaxial (+), w=1.717, e=1.818, bire=0.1010. Bastnasite-(Y) Uniaxial (-), e=1.698-1.736, w=1.702-1.742, bire=0.0040-0.0060. Vesuvianite Uniaxial (+), w=1.718, e=1.746, bire=0.0280. Holtstamite ! Uniaxial (+), w=1.719, e=1.733, bire=0.0140. Bromellite Uniaxial (-), e=1.719, w=1.731, bire=0.0120. Manganvesuvianite ! Uniaxial (-), e=1.719, w=1.721, bire=0.0020. Satterlyite Uniaxial (?), a=1.72. Droninoite ! Uniaxial (+), w=1.72, e=1.73, bire=0.0100. Florencite-(Nd) Uniaxial (+), w=1.72, e=1.75, bire=0.0300. Galileiite ! Uniaxial (-), e=1.72, w=1.73, bire=0.0100. Melanocerite-(Ce) Uniaxial (+/-), a=1.72, b=1.72, bire=0.0000. Parascorodite ! Uniaxial (-), e=1.72, w=1.724, bire=0.0040. Tetrawickmanite Uniaxial (+), w=1.721, e=1.725, bire=0.0040. Wiluite ! Uniaxial (+), w=1.721, e=1.816, bire=0.0950. Xenotime-(Y) Uniaxial (-), e=1.72-1.723, w=1.68-1.681, bire=0.0400-0.0420. Pyrochroite Uniaxial (+), w=1.722, e=1.777, bire=0.0550. Magnesiotaaffeite-2N2S Uniaxial (-), e=1.722, w=1.757, bire=0.0350. Vicanite-(Ce) Uniaxial (-), e=1.722-1.724, w=1.778-1.78, bire=0.0560. Chromdravite ! Uniaxial (+), w=1.725, e=1.81, bire=0.0850. Agardite-(Ce) ! Uniaxial (+), w=1.726, e=1.805, bire=0.0790. Plumboagardite ! Uniaxial (-), w=1.727. Kittatinnyite Uniaxial (-), e=1.728, w=1.734, bire=0.0060. Proshchenkoite-(Y) ! Uniaxial (-), e=1.728, w=1.738, bire=0.0100. Stottite Uniaxial (-), w=1.728. Wallkilldellite Uniaxial (-), e=1.729, w=1.786, bire=0.0570. Vanadiumdravite ! Uniaxial (-), e=1.73, w=1.97, bire=0.2400. Dixenite Uniaxial (-), e=1.73, w=1.735, bire=0.0050. Fluorcalciobritholite ! Uniaxial (+), w=1.73, e=1.81, bire=0.0800. Mixite Uniaxial (-), e=1.731, w=1.755, bire=0.0240. Congolite Uniaxial (+), w=1.724-1.738, e=1.746-1.758, bire=0.0200-0.0220. Connellite Uniaxial (-), e=1.735, w=1.739, bire=0.0040. Magnesiotaaffeite-6N3S ! Uniaxial (-), e=1.735, w=1.765, bire=0.0300. Sherwoodite Uniaxial (+), w=1.738, e=1.752, bire=0.0140. Buttgenbachite Uniaxial (+), w=1.739, e=1.745, bire=0.0060. Arsenoflorencite-(Ce) Uniaxial (-), e=1.728-1.75, w=1.73-1.752, bire=0.0020. Britholite-(Y) Uniaxial (+), w=1.74, e=1.75, bire=0.0100. Arsenoflorencite-(La) * Uniaxial (+), w=1.74, e=1.75, bire=0.0100. Arsenoflorencite-(Nd) * Uniaxial (+), w=1.74. Cetineite Uniaxial (+/-), a=1.73-1.75, b=1.73-1.75, bire=0.0000. Coffinite Uniaxial (-), e=1.74, w=1.8, bire=0.0600. Mongolite Uniaxial (-), e=1.74, w=1.753, bire=0.0130. Okanoganite-(Y) Uniaxial (-), e=1.74, w=1.802, bire=0.0620. Quetzalcoatlite Uniaxial (-), e=1.741, w=1.747, bire=0.0060. Akdalaite Uniaxial (+), w=1.745, e=1.765, bire=0.0200. Cerchiaraite ! Uniaxial (-), e=1.745, w=1.81, bire=0.0650. Mathewrogersite Uniaxial (+), w=1.747, e=1.776, bire=0.0290. Fleischerite Uniaxial (+), w=1.747, e=1.776, bire=0.0290. Florencite-(Ce) Uniaxial (-), e=1.748, w=1.774, bire=0.0260. Waylandite Uniaxial (-), e=1.75, w=1.8, bire=0.0500. Ammoniojarosite Uniaxial (-), e=1.75, w=1.84, bire=0.0900. Chadwickite ! Uniaxial (-), e=1.75, w=1.763, bire=0.0130. Gallobeudantite ! Uniaxial (-), e=1.75, w=1.83, bire=0.0800. Natrojarosite Uniaxial (-), w=1.75. Wallkilldellite-(Fe) ! Uniaxial (-), e=1.751, w=1.82, bire=0.0690. Povondraite ! Uniaxial (-), e=1.752, w=1.854, bire=0.1020. Tusionite Uniaxial (+), w=1.755, e=1.795, bire=0.0400. Zinclipscombite ! Uniaxial (+), w=1.757, e=1.804, bire=0.0470. Benitoite Uniaxial (+), w=1.757, e=1.76, bire=0.0030. Mcgovernite Uniaxial (-), e=1.759, w=1.77, bire=0.0110. Harrisonite ! Uniaxial (+), w=1.759-1.76, e=1.759-1.76, bire=0.0000. Theophrastite Uniaxial (?), b=1.76. Cappelenite-(Y) Uniaxial (-), e=1.76, w=1.768, bire=0.0080. Corundum Uniaxial (+), w=1.76, e=1.87, bire=0.1100. Hydroxylbastnasite-(Ce) Uniaxial (-), e=1.76, w=1.8, bire=0.0400. Kapellasite ! Uniaxial (+), w=1.76, e=1.801, bire=0.0410. Mallestigite ! Uniaxial (-), e=1.761, w=1.815, bire=0.0540. Molybdophyllite Uniaxial (-), e=1.765, w=1.775, bire=0.0100. Fresnoite Uniaxial (+), w=1.765, e=1.8, bire=0.0350. Henritermierite Uniaxial (-), e=1.768, w=1.822, bire=0.0540. Dorallcharite Uniaxial (-), e=1.769, w=1.803, bire=0.0340. Cyrilovite Uniaxial (+/-), a=1.77, b=1.81, bire=0.0400. Britholite-(Ce) Uniaxial (-), e=1.77, w=1.772, bire=0.0020. Swedenborgite Uniaxial (-), e=1.773, w=1.778, bire=0.0050. Nabokoite Uniaxial (+), w=1.765-1.784, e=1.78-1.787, bire=0.0030-0.0150. Stillwellite-(Ce) Uniaxial (-), e=1.776, w=1.783, bire=0.0070. Atlasovite Uniaxial (-), e=1.78, w=1.782, bire=0.0020. Claringbullite Uniaxial (-), e=1.78, w=1.81, bire=0.0300. Manganarsite Uniaxial (-), e=1.78, w=1.82, bire=0.0400. Nanlingite Uniaxial (+), w=1.78, e=1.988, bire=0.2080. Sitinakite Uniaxial (+), w=1.783, e=1.879, bire=0.0960. Chernovite-(Y) Uniaxial (-), e=1.783, w=1.878, bire=0.0950. Plumbojarosite Uniaxial (-), e=1.785, w=1.882, bire=0.0970. Argentojarosite Uniaxial (+), w=1.786, e=1.8, bire=0.0140. Ashburtonite Uniaxial (-), e=1.786, w=1.792, bire=0.0060. Fluorbritholite-(Ce) Uniaxial (-), e=1.786, w=1.795, bire=0.0090. Szymanskiite Uniaxial (-), e=1.787. Turtmannite ! Uniaxial (-), e=1.787-1.789, w=1.815-1.816, bire=0.0270-0.0280. Painite Uniaxial (-), w=1.79. Ferrotaaffeite-6N3S Uniaxial (+/-), a=1.79, b=1.79, bire=0.0000. Philipsbornite Uniaxial (+), w=1.797, e=1.806, bire=0.0090. Martyite ! Uniaxial (-), e=1.797, w=1.802, bire=0.0050. Sabelliite ! Uniaxial (+), w=1.799, e=1.826, bire=0.0270. Stishovite Uniaxial (+), w=1.8, e=1.81, bire=0.0100. Ferronigerite-2N1S Uniaxial (+), w=1.8, e=1.8, bire=0.0000. Kinichilite Uniaxial (-), e=1.78-1.82, w=1.79-1.84, bire=0.0100-0.0200. Thorite Uniaxial (+), w=1.802, e=1.814, bire=0.0120. Magnesionigerite-2N1S Uniaxial (+), w=1.802, e=1.814, bire=0.0120. Magnesionigerite-6N6S ! Uniaxial (-), e=1.803, w=1.853, bire=0.0500. Magnesiohogbomite-2N3S Uniaxial (-), e=1.803, w=1.853, bire=0.0500. Magnesiohogbomite-6N6S Uniaxial (+), e=1.805. Kraisslite Uniaxial (+), w=1.806-1.81, e=1.81-1.82, bire=0.0040-0.0100. Cerite-(Ce) Uniaxial (+), w=1.81, e=1.82, bire=0.0100. Cerite-(La) ! Uniaxial (+), w=1.81, e=2.02, bire=0.2100. Gaudefroyite Uniaxial (-), e=1.81, w=1.82-1.83, bire=0.0100-0.0200. Zairite Uniaxial (+), w=1.812, e=1.824, bire=0.0120. Yecoraite Uniaxial (+), w=1.81-1.816, e=1.812-1.822, bire=0.0020-0.0060. Aluminocerite-(Ce) ! Uniaxial (-), e=1.803-1.823, w=1.848-1.853, bire=0.0300-0.0450. Magnesiohogbomite-2N2S Uniaxial (+), w=1.815, e=1.91, bire=0.0950. Holfertite ! Uniaxial (-), e=1.815, w=1.845, bire=0.0300. Hyttsjoite ! Uniaxial (-), e=1.817, w=1.825, bire=0.0080. Herbertsmithite ! Uniaxial (-), e=1.817, w=1.858, bire=0.0410. Springcreekite ! Uniaxial (-), e=1.82, w=2, bire=0.1800. Bismite Uniaxial (-), e=1.82, w=1.82, bire=0.0000. Hydroniumjarosite Uniaxial (-), e=1.827, w=1.852, bire=0.0250. Ferrohogbomite-2N2S ! Uniaxial (-), e=1.83, w=1.86, bire=0.0300. Asbecasite Uniaxial (-), e=1.83, w=1.85, bire=0.0200. Beaverite Uniaxial (+), w=1.81-1.85, e=1.84-1.88, bire=0.0300. Chromatite Uniaxial (-), e=1.832, w=1.878, bire=0.0460. Zincohogbomite-2N2S ! Uniaxial (-), e=1.833, w=1.837, bire=0.0040. Jeanbandyite Uniaxial (+), w=1.84, e=1.846, bire=0.0060. Percleveite-(Ce) ! Uniaxial (+), w=1.843, e=1.848, bire=0.0050. Paratacamite Uniaxial (-), e=1.85, w=1.98, bire=0.1300. Diaboleite Uniaxial (-), e=1.85, w=1.87, bire=0.0200. Dussertite Uniaxial (+), w=1.85, e=1.93, bire=0.0800. Zemannite Uniaxial (+), w=1.857, e=1.875, bire=0.0180. Orebroite-III Uniaxial (+), w=1.857, e=1.875, bire=0.0180. Orebroite-VIII Uniaxial (+), w=1.856-1.859, e=1.876-1.882, bire=0.0200-0.0230. Franciscanite-VIII Uniaxial (+), w=1.859, e=1.876, bire=0.0170. Franciscanite-III Uniaxial (-), e=1.862, w=1.872, bire=0.0100. Benauite ! Uniaxial (+), w=1.864, e=1.88, bire=0.0160. Welinite-III Uniaxial (+), w=1.864, e=1.88, bire=0.0160. Welinite-VIII Uniaxial (+), w=1.87, e=1.92, bire=0.0500. Paraniite-(Y) Uniaxial (+), w=1.88, e=1.884, bire=0.0040. Morelandite Uniaxial (?), b=1.86-1.91. Bystromite Uniaxial (+), w=1.89, e=2, bire=0.1100. Denningite Uniaxial (?), a=1.8-2. Kleberite * Uniaxial (-), e=1.9, w=1.6-1.9, bire=0.0000-0.3000. Krivovichevite ! Uniaxial (+), w=1.9, e=2.12, bire=0.2200. Trippkeite Uniaxial (+), w=1.9, e=1.9, bire=0.0000. Wakefieldite-(La) ! Uniaxial (+), w=1.903, e=1.946, bire=0.0430. Laurelite Uniaxial (-), e=1.91, w=2.15, bire=0.2400. Bismoclite Uniaxial (-), e=1.91, w=2.15, bire=0.2400. Daubreeite Uniaxial (+), w=1.91, e=1.945, bire=0.0350. Ganomalite Uniaxial (-), e=1.912, w=1.92, bire=0.0080. Burnsite ! Uniaxial (-), e=1.91-1.92, w=1.93, bire=0.0100-0.0200. Ingersonite Uniaxial (+), w=1.918-1.92, e=1.934-1.937, bire=0.0160-0.0170. Scheelite Uniaxial (-), e=1.92, w=2.092, bire=0.1720. Rosiaite ! Uniaxial (-), e=1.926, w=2.041, bire=0.1150. Cumengite Uniaxial (+), w=1.928, e=2.002, bire=0.0740. Belkovite ! Uniaxial (-), e=1.928, w=1.935, bire=0.0070. Phosphohedyphane ! Uniaxial (+), w=1.913-1.945, e=1.923-1.971, bire=0.0100-0.0260. Nasonite Uniaxial (-), e=1.93, w=1.93, bire=0.0000. Corkite Uniaxial (-), e=1.935, w=1.935-1.955, bire=0.0000-0.0200. Kintoreite Uniaxial (-), e=1.94, w=2.09, bire=0.1500. Hydrocerussite Uniaxial (-), e=1.92-1.96, w=1.967-2.015, bire=0.0470-0.0550. Zircon Uniaxial (-), e=1.943, w=1.957, bire=0.0140. Beudantite Uniaxial (-), e=1.95, w=2.055, bire=0.1050. Feitknechtite Uniaxial (+), w=1.93-1.97, e=1.98-2.03, bire=0.0500-0.0600. Hafnon Uniaxial (+), e=1.95. Ordonezite Uniaxial (-), e=1.955, w=1.975, bire=0.0200. Segnitite Uniaxial (-), e=1.95-1.98, w=2.31-2.35, bire=0.3600-0.3700. Geikielite Uniaxial (-), e=1.967, w=1.977, bire=0.0100. Dugganite Uniaxial (+), w=1.952-1.984, e=1.971-2.01, bire=0.0190-0.0260. Dilithium * Uniaxial (+), w=1.97, e=2.65, bire=0.6800. Calomel Uniaxial (-), e=1.97, w=2, bire=0.0300. Ernienickelite Uniaxial (-), w=1.97. Graulichite-(Ce) ! Uniaxial (-), e=1.97, w=2, bire=0.0300. Jagoite Uniaxial (+), w=1.974, e=1.984, bire=0.0100. Powellite Uniaxial (+/-), a=1.948-2.01, b=1.958-2.03, bire=0.0100-0.0200. Hedyphane Uniaxial (-), e=1.99, w=2.01, bire=0.0200. Armangite Uniaxial (+), w=1.99, e=2.08, bire=0.0900. Ekatite ! Uniaxial (+), w=1.99, e=1.85, bire=0.1400. Keystoneite Uniaxial (?), a=1.99, b=1.99, bire=0.0000. Ottensite ! Uniaxial (-), e=1.999, w=2.017, bire=0.0180. Mattheddleite Uniaxial (+), w=1.99-2.01, e=2.093-2.1, bire=0.0900-0.1030. Cassiterite Uniaxial (+), w=2, e=2, bire=0.0000. Dreyerite Uniaxial (-), w=1.93-2.07. Graphite Uniaxial (+), w=2, e=2, bire=0.0000. Grechishchevite Uniaxial (-), e=2, w=2.03, bire=0.0300. Pseudoboleite Uniaxial (?), a=2. Stenhuggarite Uniaxial (?), b=2. Wakefieldite-(Ce) Uniaxial (+), w=2, e=2.14, bire=0.1400. Wakefieldite-(Y) Uniaxial (+), w=2.01, e=2.01, bire=0.0000. Argutite Uniaxial (+), w=2.013, e=2.029, bire=0.0160. Zincite Uniaxial (-), e=2.015, w=2.033, bire=0.0180. Barysilite Uniaxial (-), e=2.02, w=2.03, bire=0.0100. Nierite Uniaxial (-), e=2.025, w=2.045, bire=0.0200. Simpsonite Uniaxial (-), e=2.04, w=2.15, bire=0.1100. Matlockite Uniaxial (-), e=2.049, w=2.059, bire=0.0100. Pyromorphite Uniaxial (-), e=2.05, w=2.06, bire=0.0100. Cuzticite Uniaxial (-), e=2.059, w=2.125, bire=0.0660. Yedlinite Uniaxial (+), w=2.06, e=2.11, bire=0.0500. Abhurite Uniaxial (-), w=2.085. Pittongite ! Uniaxial (-), e=2.1, w=2.18, bire=0.0800. Cuprotungstite Uniaxial (-), e=2.1, w=2.26, bire=0.1600. Hydrohetaerolite Uniaxial (-), e=2.1, w=2.3, bire=0.2000. Iltisite ! Uniaxial (-), w=2.1. Priderite Uniaxial (-), e=2.1. Schuetteite Uniaxial (+), w=2.114, e=2.14, bire=0.0260. Phosgenite Uniaxial (+), w=2.12, e=2.16, bire=0.0400. Hiarneite ! Uniaxial (?), b=2.12. Melanostibite Uniaxial (-), e=2.12, w=2.155, bire=0.0350. Parakhinite Uniaxial (-), e=2.12, w=2.32, bire=0.2000. Santanaite Uniaxial (-), e=2.129, w=2.144, bire=0.0150. Mimetite Uniaxial (+), w=2.13, e=2.21, bire=0.0800. Penfieldite Uniaxial (+), w=2.13, e=2.18, bire=0.0500. Sphaerobismoite Uniaxial (-), e=2.14, w=2.34, bire=0.2000. Hetaerolite Uniaxial (-), e=2.15, w=2.46, bire=0.3100. Hausmannite Uniaxial (+), w=2.16, e=1.94, bire=0.2200. Baotite Uniaxial (+), w=2.18, e=2.28, bire=0.1000. Squawcreekite ? Uniaxial (+), w=2.19, e=2.21, bire=0.0200. Kleinite Uniaxial (+), w=2.19, e=2.21, bire=0.0200. Mackayite Uniaxial (-), e=2.19, w=2.27, bire=0.0800. Stolzite Uniaxial (+), w=2.19, e=2.33, bire=0.1400. Tripuhyite Uniaxial (-), e=2.2, w=2.3, bire=0.1000. Fergusonite-(Ce) * Uniaxial (-), e=2.2, w=2.3, bire=0.1000. Fergusonite-(Nd) * Uniaxial (+), w=2.2, e=2.2, bire=0.0000. Tetrarooseveltite Uniaxial (+), w=2.21, e=2.22, bire=0.0100. Iodargyrite Uniaxial (-), e=2.21, w=2.48, bire=0.2700. Pyrophanite Uniaxial (+/-), a=2.21, b=2.213, bire=0.0030. Zavaritskite Uniaxial (+), w=2.19-2.27, e=2.3-2.36, bire=0.0900-0.1100. Calzirtite Uniaxial (-), e=2.25, w=2.32, bire=0.0700. Ecdemite Uniaxial (-), e=2.25, w=2.35, bire=0.1000. Plattnerite Uniaxial (+), w=2.27, e=2.42, bire=0.1500. Tapiolite-(Fe) Uniaxial (-), e=2.2847, w=2.2949, bire=0.0102. Finnemanite Uniaxial (-), e=2.3, w=2.4, bire=0.1000. Chiluite Uniaxial (-), e=2.3, w=2.4, bire=0.1000. Pottsite Uniaxial (+), e=2.3. Schiavinatoite ! Uniaxial (+), w=2.3, e=2.5, bire=0.2000. Tillmannsite ! Uniaxial (-), e=2.304, w=2.402, bire=0.0980. Wulfenite Uniaxial (-), e=2.31, w=2.36, bire=0.0500. Langbanite Uniaxial (-), e=2.32, w=2.39, bire=0.0700. Asisite Uniaxial (?), a=2.33, b=2.37, bire=0.0400. Dukeite ! Uniaxial (-), e=2.33, w=2.4, bire=0.0700. Lorettoite ? Uniaxial (-), e=2.35, w=2.416, bire=0.0660. Vanadinite Uniaxial (+), w=2.356, e=2.378, bire=0.0220. Wurtzite Uniaxial (-), e=2.373, w=2.388, bire=0.0150. Landauite Uniaxial (?), a=2.4. Minium Uniaxial (-), e=2.4, w=2.6, bire=0.2000. Trechmannite Uniaxial (+/-), a=2.404, b=2.404, bire=0.0000. Lonsdaleite Uniaxial (-), e=2.42, w=2.58, bire=0.1600. Parkinsonite Uniaxial (+), w=2.476, e=2.485, bire=0.0090. Changbaiite Uniaxial (-), e=2.488, w=2.561, bire=0.0730. Anatase Uniaxial (+), w=2.5, e=2.55, bire=0.0500. Chrombismite ! Uniaxial (-), e=2.5. Senaite Uniaxial (+/-), a=2.506, b=2.529, bire=0.0230. Greenockite Uniaxial (-), e=2.535, w=2.665, bire=0.1300. Litharge Uniaxial (+), w=2.61, e=2.85, bire=0.2400. Hypercinnabar Uniaxial (+), w=2.605-2.621, e=2.899-2.908, bire=0.2870-0.2940. Rutile Uniaxial (+), w=2.654, e=2.967, bire=0.3130. Moissanite Uniaxial (+/-), a=2.62-2.77, b=2.62-2.77, bire=0.0000. Rambergite ! Uniaxial (-), e=2.72, w=2.73, bire=0.0100. Chalcophanite Uniaxial (-), e=2.792, w=3.087-3.088, bire=0.2950-0.2960. Proustite Uniaxial (-), e=2.881, w=3.084, bire=0.2030. Pyrargyrite Uniaxial (+), w=2.905, e=3.256, bire=0.3510. Cinnabar Uniaxial (-), e=2.87-2.94, w=3.15-3.22, bire=0.2800. Hematite Uniaxial (+), w=3, e=4.04, bire=1.0400. Selenium