Space Groups in class: Aba2, Abm2, Ama2, Amm2, Ccc2, Cmc21, Cmm2, Fdd2, Fmm2, Iba2, Ima2, Imm2, Pba2, Pca21, Pcc2, Pma2, Pmc21, Pmm2, Pmn21, Pna21, Pnc2, and Pnn2.
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