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An isometric mineral, (Ca,Na,U)2 (Ti,Nb,Ta)2 O6 (OH); pyrochlore group; forms a series with pyrochlore; name assigned to members of the series having uranium greater than 15%; radioactive; in granitic pegmatites. CF: uranpyrochlore

Source: Frondel, Judith Weiss and Michael Fleischer. 1955. Glossary of Uranium- and Thorium-Bearing Minerals, Third Edition. Washington DC: United States Government Printing Office

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