Item talk:Q162382

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Mindat Short Description

Minerals of the Euxenite-(Y)-Polycrase-(Y) series are the most widespread niobates after columbite-(Fe) and pyrochlore. Euxenite-(Y) is typically metamict.

Compare Nioboaeschynite-(Y) which has different space-group symmetry. Compare also Fergusoni...

Geoscience Ontology Status Notes

Scheerer T (1840) Ueber den euxenite, eine neue mineralspecies, Annalen der Physik und Chemie 50, 149-153 Name changed from euxenite: Nickel E H, Mandarino J A (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature, American Mineralogist 72, 1031-1042

IMA Formula (from Mindat)

Y(Ti,Nb)2(O,OH)6

RRUFF Formula (from Geoscience Ontology)

(Y3+,Ca,Ce3+,U4+,Th4+)(Nb5+,Ta5+,Ti4+)2O6

Additional References