Columbite-(Fe)
Tarantino S C, Zema M
American Mineralogist 90 (2005) 1291-1300
Mixing and ordering behavior in manganocolumbite-ferrocolumbite solid solution:
A single-crystal X-ray diffraction study
Sample: BRA n3 Qm=1 from S. Jose de Safira, Minas Gerais, Brazil
_database_code_amcsd 0003847
14.2877 5.7363 5.0561 90 90 90 Pbcn
atom       x      y       z  occ  Uiso
FeA        0 .32935     .25 .202 .0066
MnA        0 .32935     .25 .767 .0066
TiA        0 .32935     .25 .028 .0066
ScA        0 .32935     .25 .001 .0066
CaA        0 .32935     .25 .001 .0066
SnA        0 .32935     .25 .001 .0066
NbB  .161507 .18026 .747924 .955 .0047
TaB  .161507 .18026 .747924 .040 .0047
TiB  .161507 .18026 .747924 .004 .0047
WB   .161507 .18026 .747924 .001 .0047
O1    .09697 .10323  .06932      .0069
O2    .08150 .38359  .59769      .0080
O3    .24388 .12397  .41844      .0061