AM_Sapphirine_1 Formula: Mg2.218 Ga3.557 Ge1.225 O10 Name: Sapphirine Unit cell: 8.822 9.794 10.256 63.82 84.77 65.32 , V=717.87 Space group: P-1 (2)

Barbier J , European Journal of Mineralogy , 10 (1998) p.1283-1293, Crystal structures of sapphirine and surinamite analogues, in the MgO-Ga2O3-GeO2 system