AM_Pyroxene-ideal_22 Formula: Si Mg O3 Name: Pyroxene-ideal Unit cell: 19.899748 6.0 3.4641016 90.0 100.02499 90.0 , V=407.29 Space group: C1C1 (9)

Thompson R M , Downs R T , American Mineralogist , 88 (2003) p.653-666, Model pyroxenes I: Ideal pyroxene topologies, Pyroxene #16 based on stacking sequence ABABACABABAC, Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.