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=0.902 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
	_database_code_amcsd 0003837
	14.2744 5.7321 5.0616 90 90 90 Pbcn
	atom x y z occ Uiso
	FeA 0 .32897 .25 .739 .0061
	MnA 0 .32897 .25 .195 .0061
	NbA 0 .32897 .25 .066 .0061
	NbB .161958 .17943 .74774 .917 .0047
	TaB .161958 .17943 .74774 .050 .0047
	FeB .161958 .17943 .74774 .026 .0047
	MnB .161958 .17943 .74774 .007 .0047
	O1 .09645 .10415 .0700 .0070
	O2 .41903 .11675 .0964 .0084
	O3 .75604 .12375 .0821 .0066
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