AM_Diopside_115 Formula: (Ca.94 Na.06) (Mg.964 Fe.036) Si2 O6 Name: Diopside Unit cell: 9.726 8.907 5.256 90.0 106.1 90.0 , V=437.47 Space group: C12/C1 (15)

Mottana A , Rossi G , Kracher A , Kurat G , Tschermaks Mineralogische und Petrographische Mitteilungen , 26 (1979) p.187-201, Violan revisited: Mn-bearing Omphacite and Diopside, Locality: manganese deposit of Praborna, St Marcel, Aosta Valley, Italy