AM_Alumotantite Formula: Ta Al O4 Name: Alumotantite Unit cell: 4.473 11.308 4.775 90.0 90.0 90.0 , V=241.52 Space group: PBCN (60)

Ercit T S , Hawthorne F C , Cerny P , The Canadian Mineralogist , 30 (1992) p.653-662, The crystal structure of alumotantite: Its relation to, the structures of simpsonite and the (Al,Ga)(Ta,Nb)O4 compounds