Alumotantite
Ercit T S, Hawthorne F C, Cerny P
The Canadian Mineralogist 30 (1992) 653-662
The crystal structure of alumotantite: Its relation to
the structures of simpsonite and the (Al,Ga)(Ta,Nb)O4 compounds
_database_code_amcsd 0005280
4.473 11.308 4.775 90 90 90 Pbcn
atom    x      y    z Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3)
Ta      0 .16817  .25       .0062  .0004  .0055      0 -.0002      0
Al      0  .4346  .25  .44
O1   .222   .312 .086       .0045  .0013  .0063 -.0008 -.0003 -.0002
O2   .266   .058 .073       .0132  .0002  .0090  .0000 -.0098  .0000