AM_Osumilite_11 Formula: Ba Mg2 Si9 Al6 O30 Name: Osumilite Unit cell: 10.129 10.129 14.34 90.0 90.0 120.0 , V=1274.13 Space group: P6/MCC (192)

Winter W , Armbruster T , Lengauer C , European Journal of Mineralogy , 7 (1995) p.277-286, Crystal structure refinement of synthetic osumilite-type, phases: BaMg2Al6Si9O30, SrMg2Al6Si9O30 and Mg2Al4Si11O30, Sample: CBa, BaMg2Al6Si9O30