AM_Ferrosilite_6 Formula: Mg1.318 Fe.65 Ca.032 Si2 O6 Name: Ferrosilite Unit cell: 18.546 9.081 5.298 90.0 90.0 90.0 , V=892.27 Space group: PBCA (61)

Smyth J R , American Mineralogist , 58 (1973) p.636-648, An orthopyroxene structure up to 850 C, T = 850 C