AM_Pyroxene-ideal_128 Formula: Mg Si O3 Name: Pyroxene-ideal Unit cell: 18.363 8.864 5.118 90.0 90.0 90.0 , V=833.05 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 after Hugh-Jones and Angel (1994) with, O3A-O3A-O3A angle = 158.7, O3B-O3B-O3B angle = 139.0, and model oxygen radius = 1.302