AM_Pyroxene-ideal_129 Formula: Mg Si O3 Name: Pyroxene-ideal Unit cell: 18.027 8.683 5.013 90.0 90.0 90.0 , V=784.68 Space group: PBCA (61)

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 orthoenstatite at 8.10 GPa after Hugh-Jones and Angel (1994) with, O3A-O3A-O3A angle = 158.5, O3B-O3B-O3B angle = 136.4, and model oxygen radius = 1.276