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