AM_Hercynite_17 Formula: Fe.999 Al2 O4 Name: Hercynite Unit cell: 8.22525 8.22525 8.22525 90.0 90.0 90.0 , V=556.48 Space group: FD3M (227)

Harrison R J , Redfern S A T , O Neill H St C , American Mineralogist , 83 (1998) p.1092-1099, The temperature dependence of the cation distribution in synthetic hercynite, (FeAl2O4) from in-situ neutron structure refinements, Sample at T = 1373 K