AM_Hercynite_73 Formula: Al1.81 Fe.73 Mg.29 O4 Name: Hercynite Unit cell: 8.0975 8.0975 8.0975 90.0 90.0 90.0 , V=530.95 Space group: FD3M (227)

Lavina B , Princivalle F , Della Giusta A , Physics and Chemistry of Minerals , 32 (2005) p.83-88, Controlled time-temperature oxidation reaction in a synthetic Mg-hercynite, Spinel structure, Sample: Annealing temperature and time T = 600 C, t = 1842 h