Columbite-(Mn)
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: RIO n5 Qm=1 from Rio Arriba Co., Globe Mine, U.S.A.
_database_code_amcsd 0003849
14.3434 5.7415 5.0665 90 90 90 Pbcn
atom       x      y      z  occ  Uiso
FeA        0 .32435    .25 .534 .0079
MnA        0 .32435    .25 .457 .0079
TiA        0 .32435    .25 .007 .0079
SnA        0 .32435    .25 .001 .0079
CaA        0 .32435    .25 .001 .0079
NbB  .162060 .17992 .74297 .918 .0063
TaB  .162060 .17992 .74297 .047 .0063
TiB  .162060 .17992 .74297 .028 .0063
WB   .162060 .17992 .74297 .007 .0063
O1    .09738  .1011  .0633      .0084
O2    .08183  .3842  .5963      .0098
O3    .24378  .1246  .4138      .0080