AM_Grandidierite_3 Formula: (Mg.726 Fe.274) Al3 B Si O9 Name: Grandidierite Unit cell: 10.3347 11.0034 5.7627 90.0 90.0 90.0 , V=655.32 Space group: PBNM (62)

Dzikowski T J , Groat L A , Grew E S , American Mineralogist , 92 (2007) p.863-872, The geometric effects of VFe2+ for VMg substitution on the crystal structures, of the grandidierite-ominelite series, Sample: G12, Locality: Zimbabwe