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uraninite

uraninite (pitchblende) Mineral, UO2; sp. gr. from 8.5 when massive to 10 for unaltered crystals; hardness 5–6; cubic; it is brownish-black or grey-black; brownish-black streak; sub-metallic, greasy lustre; crystals very rare, the mineral is usually found as botryoidal masses; no cleavage; radioactive; occurs in pegmatites, and in association with monazite, zircon, and tourmaline, in hydrothermal veins together with cassiterite, pyrite, chalcopyrite, and galena, and as a detrital material in alluvials. It is a major ore mineral for uranium metal.

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"uraninite." A Dictionary of Earth Sciences. . Encyclopedia.com. 20 Aug. 2017 <http://www.encyclopedia.com>.

"uraninite." A Dictionary of Earth Sciences. . Encyclopedia.com. (August 20, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/uraninite

"uraninite." A Dictionary of Earth Sciences. . Retrieved August 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/uraninite

uraninite

uraninite (pitchblende) Dense radioactive mineral form of uranium oxide, UO2, the chief ore of uranium and the most important source for uranium and radium. The blackish, lustrous ore occurs as a constituent of quartz veins. Hardness 5–6; r.d. 6.5–8.5.

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"uraninite." World Encyclopedia. . Encyclopedia.com. 20 Aug. 2017 <http://www.encyclopedia.com>.

"uraninite." World Encyclopedia. . Encyclopedia.com. (August 20, 2017). http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/uraninite

"uraninite." World Encyclopedia. . Retrieved August 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/uraninite

uraninite

uraninite: see pitchblende.

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"uraninite." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 20 Aug. 2017 <http://www.encyclopedia.com>.

"uraninite." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (August 20, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/uraninite

"uraninite." The Columbia Encyclopedia, 6th ed.. . Retrieved August 20, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/uraninite