"Pitchblende" redirects here. For other uses, see Pitchblende (disambiguation).
Uraninite
Pitchblende from Niederschlema-Alberoda deposit, Germany
General
Category
Oxide minerals
Formula (repeating unit)
Uranium dioxide or uranium(IV) oxide (UO2)
IMA symbol
Urn[1]
Strunz classification
4.DL.05
Crystal system
Isometric
Crystal class
Hexoctahedral (m3m) H-M symbol: (4/m 3 2/m)
Space group
Fm3m
Unit cell
a = 5.4682 Å; Z = 4
Identification
Color
Steel-black to velvet-black, brownish black, pale gray to pale green; in transmitted light, pale green, pale yellow to deep brown and green-gray (thin fragments)
Uraninite, also known as pitchblende, is a radioactive, uranium-rich mineral and ore with a chemical composition that is largely UO2 but because of oxidation typically contains variable proportions of U3O8. Radioactive decay of the uranium causes the mineral to contain oxides of lead and trace amounts of helium. It may also contain thorium and rare-earth elements.[2][4]
^ abKlein, Cornelis and Cornelius S. Hurlbut, Jr., Manual of Mineralogy, Wiley, 1985, 20th ed. pp. 307–308 ISBN 0-471-80580-7
^Anthony, John W.; Bideaux, Richard A.; Bladh, Kenneth W.; Nichols, Monte C. (eds.). "Uraninite". Handbook of Mineralogy(PDF). Vol. III (Halides, Hydroxides, Oxides). Chantilly, VA: Mineralogical Society of America. ISBN 0-9622097-2-4. Archived (PDF) from the original on March 14, 2012. Retrieved December 5, 2011.
^ abUraninite Archived November 10, 2012, at the Wayback Machine. Mindat.org
^Uraninite Archived October 21, 2011, at the Wayback Machine. Webmineral.com
Uraninite, also known as pitchblende, is a radioactive, uranium-rich mineral and ore with a chemical composition that is largely UO2 but because of oxidation...
naturally formed in supernova explosions. The primary uranium ore mineral is uraninite (UO2) (previously known as pitchblende). A range of other uranium minerals...
1898 from ore mined at Jáchymov. They extracted the radium compound from uraninite and published the discovery at the French Academy of Sciences five days...
is now not regarded as a separate mineral species, but as a variety of uraninite. In 1903, large reserves of helium were found in natural gas fields in...
fractures, joints, and minor faults within the Katanga synclinorium. Uraninite mineralization occurred 630 Ma ago, when uraniferous solutions percolated...
Yellowcake is hazardous when inhaled. Uranium ore deposits Uranium mining Uraninite, an ore that is mostly uranium dioxide (UO2) Yellowcake forgery, fraudulently...
asbestiform serpentine) Citrine (yellow variety of quartz) Cleveite (variety of uraninite) Clinochrysotile (polytype of chrysotile) Coltan (short for minerals of...
and in hydrothermal vein type deposits. It occurs in association with uraninite, thorite, pyrite, marcasite, roscoelite, clay minerals and amorphous organic...
Cleveite is an impure radioactive variety of uraninite containing uranium, found in Norway. It has the composition UO2 with about 10% of the uranium substituted...
ThO2. It was originally described by Ananda Coomaraswamy in 1904 as uraninite, but recognized as a new species by Wyndham R. Dunstan. It was so named...
amounts of the yttrium earths. It is an alteration product of yttrian uraninite. It was first described by Adolf Erik Nordenskiöld, who discovered it...
several oxides: Uranium dioxide or uranium(IV) oxide (UO2, the mineral uraninite or pitchblende) Diuranium pentoxide or uranium(V) oxide (U2O5) Uranium...
radioactive, crystalline powder that naturally occurs in the mineral uraninite. It is used in nuclear fuel rods in nuclear reactors. A mixture of uranium...
and is commercially extracted from uranium-bearing minerals such as uraninite. Many contemporary uses of uranium exploit its unique nuclear properties...
oxides, silicates, and hydrates of uranium, derived from the alteration of uraninite. It is named for its gum-like luster. The material has been known by various...
radioactive elements could be a defining constituent, such as uranium in uraninite, autunite, and carnotite, or present as trace impurities, as in zircon...
sediments older than about 2 billion years contained grains of pyrite, uraninite, and siderite, all minerals containing reduced forms of iron or uranium...
occurs as a secondary mineral as a weathering product of uraninite. In addition to uraninite it occurs associated with the rare minerals becquerelite...
parts per trillion, but may reach up to a few parts per million in some uraninite ore deposits. Because of its scarcity, high radioactivity, and high toxicity...
Marie and Pierre Curie in 1898. They extracted the radium compound from uraninite and published the discovery at the French Academy of Sciences five days...
with torbernite, but is also found amongside autunite, meta-autunite and uraninite. Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical...
element is the least abundant: radioactive radium, which was extracted from uraninite in 1898. All elements except beryllium were isolated by electrolysis of...
Global Information
Radioactive 70 Bq/g to 150 kBq/g