AM_Neltnerite Formula: Ca.95 Mn6.05 Si O12 Name: Neltnerite Unit cell: 9.468 9.468 18.862 90.0 90.0 90.0 , V=1690.85 Space group: I41/ACD (142)

de Villiers J P R , Dobson S M , Buseck P R , European Journal of Mineralogy , 3 (1991) p.567-573, Refinement of the crystal structure of neltnerite,, a member of the bixbyite-braunite group of minerals