AM_Jacobsite Formula: Mg.736 Mn.284 Fe1.911 Zn.017 Al.049 O4 Name: Jacobsite Unit cell: 8.4075 8.4075 8.4075 90.0 90.0 90.0 , V=594.29 Space group: FD3M (227)

Lucchesi S , Russo U , Della Giusta A , European Journal of Mineralogy , 9 (1997) p.31-42, Crystal chemistry and cation distribution in some, Mn-rich natural and synthetic spinels, Sample: JBS1