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- W169241857 abstract "The field examination and preliminary laboratory study of radioactive albite-riebeckite--granite from four Nigerian localities are presented. The granite is a medium-grained rock, white in mass color, and flecked with lustrous black prisms of riebeckite. Small vitreous honey-colored crystals of pyrochlore are present to a varying extent, but can be seen in nearly all hand specimens. Pyrochlore, a fluoniobate of Na and Ca, is the essential radioactive mineral, with minor quantities of zircon, monazite, and thorite. Radiometric assays show the pyrochlore to contain 4.1% equivalent urania. Confirmation of this determination is found in the chemical analysis which gives the following contents: 3.1% U/sub 3/O/sub 8/, 3.3% ThO/sub 2/, and 41.1% (Nb, Ta)/sub 2/O/sub 5/. (W.L.H.)" @default.
- W169241857 created "2016-06-24" @default.
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- W169241857 date "1952-01-01" @default.
- W169241857 modified "2023-09-27" @default.
- W169241857 title "The albite-riebeckite-granites of Nigeria" @default.
- W169241857 hasPublicationYear "1952" @default.
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