AM_Pyroxene-ideal_106 Formula: Mn Na Si2 O6 Name: Pyroxene-ideal Unit cell: 9.698 8.973 5.181 90.0 109.9 90.0 , V=423.93 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 sodium manganese px after Ohashi et al. (1987), with O3-O3-O3 angle = 174.1 and model oxygen radius = 1.297