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: KRA n3p Qm=1 from Kragero, Norway
_database_code_amcsd 0003850
14.4003 5.7501 5.0784 90 90 90 Pbcn
atom       x      y      z  occ  Uiso
FeA        0 .31956    .25 .806 .0074
MnA        0 .31956    .25 .148 .0074
TiA        0 .31956    .25 .034 .0074
CaA        0 .31956    .25 .008 .0074
SnA        0 .31956    .25 .003 .0074
ScA        0 .31956    .25 .001 .0074
NbB  .162545 .17972 .73927 .901 .0056
TaB  .162545 .17972 .73927 .076 .0056
TiB  .162545 .17972 .73927 .023 .0056
O1    .09818  .0991  .0581      .0084
O2    .41740  .1164  .0969      .0092
O3    .75611  .1265  .0900      .0073