AM_Pyroxene-ideal_78 Formula: Si Mg O3 Name: Pyroxene-ideal Unit cell: 19.595919 6.0 3.4641016 90.0 90.0 90.0 , V=407.29 Space group: P1C1 (7)

Thompson R M , Downs R T , American Mineralogist , 88 (2003) p.653-666, Model pyroxenes I: Ideal pyroxene topologies, Pyroxene #52 based on stacking sequence ABABCBACBCAC, Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.