pitchblende

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pitch·blende

(pich'blend),
A mineral of pitchlike appearance, chiefly uranium dioxide, the main source of uranium and elements, such as radium, produced as a result of the radioactive breakdown of that element.
Synonym(s): uraninite

pitchblende

(pĭch′blĕnd)
Uraninite, the principal source of uranium. It is a mineral that resembles pitch.
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References in periodicals archive ?
Moreover, there are also rhenium occurrences associated with uraninites [35, 36].
2], known in nature as uraninite, which has a fluorite structure.
2][greater than] uranyl oxide hydrates [greater than] uranlyl silicates [greater than] uranyl alkali + alkaline earth silicates, is identical to that observed in surficial weathering zones of natural uraninite deposits.
Thus, dissolved uranium settles out as uraninite (uranium ore) and can be filtered from water.
Uranium mineralization at Nuottijarvi occurs as uraninite associated with fluorapatite breccia, hosted by a carbonate-apatite horizon at the contact between quartzite and graphitic breccia.
Also called as urania, UO2, is a radioactive, crystalline powder that naturally exists in the mineral uraninite, utilized in nuclear fuel rods in nuclear reactors.
As well, significant Uraninite and secondary uranium minerals have been identified in surface exposures at the Grandroy zone.
Also discovered in the Dunae Lake area were uraninite pebbles located within a
Uranium at Nuottijarvi is present as uraninite associated with fluorapatite, within a 40 metre wide mineralized breccia, hosted by a carbonate-apatite horizon at the contact between quartzite and graphite-bearing phyllite.
G5 is a sample of the CMG which is a light pink, medium-to coarse-grained alkali feldspar granite containing, on average, 38% quartz, 33% orthoclase, 27% albite (~An5), and 2% biotite with accessory apatite, zircon, monazite, uraninite and thorite.
The uranium mineral is primarily uraninite, and where present at grades of greater than 500 ppm, is marked by the presence of significant visible smokey quartz and, frequently, biotite.