AM_Grandidierite Formula: (Mg.976 Fe.024) Al3 B Si O9 Name: Grandidierite Unit cell: 10.325 10.9575 5.76 90.0 90.0 90.0 , V=651.66 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: G17, Locality: Madagascar