AM_Spinel_303 Formula: Mg1.147 Al1.609 Cr.244 O4 Name: Spinel Unit cell: 8.1178 8.1178 8.1178 90.0 90.0 90.0 , V=534.95 Space group: FD3M (227)

Princivalle F , Martignago F , Dal Negro A , American Mineralogist , 91 (2006) p.313-318, Kinetics of cation ordering in natural Mg(Al,Cr3+)2O4 spinels, Locality: Olkhon metamorphic complex, Lake Baikal, Russia, Sample: Sc, annealed at T = 650 C, ordering, t = 240 m