AM_Hercynite_69 Formula: Al1.87 Fe.74 Mg.29 O4 Name: Hercynite Unit cell: 8.1172 8.1172 8.1172 90.0 90.0 90.0 , V=534.83 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 = 452 h