AM_Clinopyroxene Formula: Mg.57 Fe.22 Al.64 Ti.07 (Ca.98 Mn.01 Na.01) Si1.5 O6 Name: Clinopyroxene Unit cell: 9.794 8.906 5.319 90.0 105.9 90.0 , V=446.20 Space group: C12/C1 (15)

Peacor D R , American Mineralogist , 52 (1967) p.31-41, Refinement of the crystal structure of a pyroxene of formula M1M2(Si1.5Al0.5)O6