AM_Hercynite_23 Formula: (Al1.981 Mg.648 Fe.371) O4 Name: Hercynite Unit cell: 8.1134 8.1134 8.1134 90.0 90.0 90.0 , V=534.08 Space group: FD3M (227)

Andreozzi G B , Lucchesi S , American Mineralogist , 87 (2002) p.1113-1120, Intersite distribution of Fe2+ and Mg in the spinel (sensu stricto) -, hercynite series by single-crystal X-ray diffraction, Sample: He5a/a