AM_Pyroxene-ideal_121 Formula: Mg Si O3 Name: Pyroxene-ideal Unit cell: 9.764 8.953 5.169 90.0 108.8 90.0 , V=427.75 Space group: P121/C1 (14)

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 low clinoenstatite at 700C after Pannhorst (1984) with, O3A-O3A-O3A angle = 197.1, O3B-O3B-O3B angle = 141.6, and model oxygen radius = 1.307