AM_Pyroxene-ideal_105 Formula: Al Na Si2 O6 Name: Pyroxene-ideal Unit cell: 9.527 8.81 5.087 90.0 110.0 90.0 , V=401.22 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 jadeite after Clark et al. (1969), with O3-O3-O3 angle = 174.7 and model oxygen radius = 1.273