AM_Hercynite_66 Formula: Al1.91 Fe.77 Mg.29 O4 Name: Hercynite Unit cell: 8.1329 8.1329 8.1329 90.0 90.0 90.0 , V=537.94 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 = 260 h