AM_Spinel_402 Formula: Al1.839 Fe.283 Mg.777 Si.003 Zn.007 Cr.078 Ni.014 O4 Name: Spinel Unit cell: 8.1252 8.1252 8.1252 90.0 90.0 90.0 , V=536.42 Space group: FD3M (227)

Menegazzo G , Carbonin S , Physics and Chemistry of Minerals , 25 (1998) p.541-547, Oxidation mechanisms in Al-Mg-Fe spinels., A second stage: alpha-Fe2O3 exsolution, Sample: TS11B1, unheated, T = 25 C