AM_Diopside_13 Formula: (Ni.74 Mg.26) Ca Si2 O6 Name: Diopside Unit cell: 9.7372 8.8986 5.2313 90.0 105.826 90.0 , V=436.10 Space group: C12/C1 (15)

Raudsepp M , Hawthorne F C , Turnock A C , American Mineralogist , 75 (1990) p.1274-1281, Crystal chemistry of synthetic pyroxenes on the join CaNiSi2O6-CaMgSi2O6, (diopside): A Rietveld refinement study, sample Ni80, CaNi.74Mg.26Si2O6