Columbite
Sturdivant J
Zeitschrift fur Kristallographie 75 (1930) 88-108
The Crystal Structure of Columbite
_cod_database_code 1010915
_database_code_amcsd 0017641
5.082 14.238 5.73 90 90 90 Pnca
atom    x    y    z
Fe1   .75    0   .6
Nb1     0 .163 .075
O1   .333  .09 .155
O2   .333  .41  .15
O3    .32  .75  .17