AM_Pyroxene-ideal_84 Formula: Mg Si O3 Name: Pyroxene-ideal Unit cell: 7.526 6.928 4.0 90.0 110.8 90.0 , V=194.97 Space group: C12/C1 (15)

Thompson R M , Downs R T , American Mineralogist , 89 (2004) p.614-628, Model pyroxenes II: Structural variation as a function of tetrahedral rotation, model with O3-O3-O3 angle = 180 and model oxygen radius = 1, Note: Atoms Mg, Si, and O are assigned to atomic positions for convenience