Formula: Ca.72 Na.027 Mg1.03 Fe.111 Mn.003 Al.189 Ti.003 Cr.04 Si1.891 O6
Name: Diopside
Unit cell: 9.716 8.887 5.26 90.0 106.57 90.0 , V=435.32
Space group: C12/C1 (15)

Salviulo G , Princivalle F , Demarchi G , Fabro C , Physics and Chemistry of Minerals , 19 (1992) p.213-219, Effects of Ca-Mg substitution in C2/c pyroxene structure on, natural clinopyroxenes from spinel peridotite nodules (Pico Cabugi, Brazil), Sample: PC109, Locality: sample from Pico Cabugi, Brazil