Item talk:Q162382
From geokb
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
