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: AMB n3 Qm=1 from Ambatofotsikely, Madagascar
_database_code_amcsd 0003848
14.3267 5.7392 5.0674 90 90 90 Pbcn
atom       x      y      z  occ  Uiso
FeA        0 .32531    .25 .462 .0081
MnA        0 .32531    .25 .476 .0081
ScA        0 .32531    .25 .045 .0081
TiA        0 .32531    .25 .012 .0081
SnA        0 .32531    .25 .004 .0081
CaA        0 .32531    .25 .001 .0081
NbB  .162115 .17965 .74368 .903 .0060
TaB  .162115 .17965 .74368 .043 .0060
TiB  .162115 .17965 .74368 .052 .0060
WB   .162115 .17965 .74368 .002 .0060
O1    .09742  .1025  .0641      .0068
O2    .08143  .3835  .5974      .0087
O3    .24383  .1239  .4138      .0069