Ferrocolumbite
	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 n18 Qm=0.759 from S. Jose de Safira, Minas Gerais, Brazil
	Sample: Annealed at T = 700 C for t = 20 m
	Note: Occupancies calculated assuming complete Fe/Mn disorder
	_database_code_amcsd 0003835
	14.2658 5.7299 5.0748 90 90 90 Pbcn
	atom x y z occ Uiso
	FeA 0 .32883 .25 .664 .0065
	MnA 0 .32883 .25 .175 .0065
	NbA 0 .32883 .25 .161 .0065
	NbB .162499 .178229 .74783 .870 .0052
	FeB .162499 .178229 .74783 .063 .0052
	TaB .162499 .178229 .74783 .050 .0052
	MnB .162499 .178229 .74783 .017 .0052
	O1 .09553 .10546 .0708 .0079
	O2 .41954 .11696 .0949 .0088
	O3 .75613 .12263 .0820 .0074
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