AM_Grandidierite_1 Formula: (Mg.874 Fe.126) Al3 B Si O9 Name: Grandidierite Unit cell: 10.333 10.9858 5.7667 90.0 90.0 90.0 , V=654.61 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: G8, Locality: Long Lake, Larsemann Hills, Antarctica