Formula: Mg.83 Cr.09 Al.1 Fe.05 Ca.78 Na.18 Si1.97 O6
Name: Diopside
Unit cell: 9.693 8.889 5.253 90.0 106.34 90.0 , V=434.32
Space group: C12/C1 (15)

Oberti R , Caporuscio F A , American Mineralogist , 76 (1991) p.1141-1152, Crystal chemistry of clinopyroxenes from mantle eclogites: A study of the key, role of the M2 site population by means of crystal-structure refinement, sample SBB 7P, Di78Jd18, diopside - jadeite join