AM_Jacobsite_1 Formula: Mg.475 Mn.446 Fe2.068 Zn.006 Ti.002 O4 Name: Jacobsite Unit cell: 8.4454 8.4454 8.4454 90.0 90.0 90.0 , V=602.37 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: JBS3