AM_Spessartine Formula: Si3 Al2 (Mn2.61 Fe.39) O12 Name: Spessartine Unit cell: 11.612 11.612 11.612 90.0 90.0 90.0 , V=1565.75 Space group: IA-3D (230)

Novak G A , Gibbs G V , American Mineralogist , 56 (1971) p.791-825, The crystal chemistry of the silicate garnets, sample Sp