AM_Columbite-(Fe)_11
Formula: Fe.791 Mn.209 Nb1.9 Ta.1 O6
Name: Columbite-(Fe)
Unit cell: 14.2744 5.7321 5.0616 90.0 90.0 90.0 , V=414.15
Space group: PBCN (60)

Tarantino S C , Zema M , American Mineralogist , 90 (2005) p.1291-1300, Mixing and ordering behavior in manganocolumbite-ferrocolumbite solid solution:, A single-crystal X-ray diffraction study, Sample: BRA n18 Qm=0.902 from S. Jose de Safira, Minas Gerais, Brazil, Sample: Annealed at T = 800 C for t = 40 m, Note: Occupancies calculated assuming complete Fe/Mn disorder