AM_Columbite-(Fe)_14 Formula: Fe.747 Mn.215 Ti.027 Nb1.894 Ta.094 W.003 Sc.003 Ca.001 Sn.001 O6 Name: Columbite-(Fe) Unit cell: 14.3191 5.7482 5.0713 90.0 90.0 90.0 , V=417.41 Space group: PBCN (60)

Tarantino S C , Zema M , Pistorino M , Domeneghetti M C , Physics and Chemistry of Minerals , 30 (2003) p.590-598, High-temperature X-ray investigation of natural columbites, Note: sample BRA3 at T = 300 C, Locality: San Jose de Safira, Minas Gerais, Brazil