AM_Spinel_25 Formula: Ni1.001 Al2.001 O4 Name: Spinel Unit cell: 8.04897 8.04897 8.04897 90.0 90.0 90.0 , V=521.46 Space group: FD3M (227)

Roelofsen J N , Peterson R C , Raudsepp M , American Mineralogist , 77 (1992) p.522-528, Structural variation in nickel aluminate spinel (NiAl2O4), sample quench temperature = 1000 C, initially annealed at 1300 C