AM_Spinel_15 Formula: Ni.999 Al1.999 O4 Name: Spinel Unit cell: 8.05221 8.05221 8.05221 90.0 90.0 90.0 , V=522.09 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 = 1400 C, initially annealed at 800 C