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Uraninite, also known as pitchblende, is a radioactive, uranium-rich mineral and ore with a chemical composition that is largely UO 2 but because of oxidation typically contains variable proportions of U 3 O 8. Radioactive decay of the uranium causes the mineral to contain oxides of lead and trace amounts of helium.
The mineral was named by Henry J. Brooke and William H. Miller in 1854. [5] The archaic name "calco-uranite" pairs with the similarly composed mineral, torbernite, which was named "cupro-uranite". Both minerals are named due to their uranium content, with autunite's name referring to its calcium (calco), and torbernite's copper (cupro) quantity ...
Metasomatite deposits consist of disseminated uranium minerals within structurally deformed rocks that have been affected by intense sodium metasomatism. [10] [11] Ore minerals are uraninite and brannerite. Th/U ratio in the ores is mostly less than 0.1. Metasomatites are typically small in size and generally contain less than 1000 t U 3 O 8. [11]
Chrysotile (group name - asbestiform serpentine) Citrine (yellow variety of quartz) Cleveite (variety of uraninite) Clinochrysotile (polytype of chrysotile) Coltan (short for minerals of the columbite group) Crocidolite (asbestiform riebeckite) Cymophane (variety of chrysoberyl)
For example, different types of apples each have their own PLU code, as do different kinds of nuts, organic vs. non-organic lettuce, and so on. The stickers also usually contain barcodes for easy ...
[12] [22] Uranium is found in hundreds of minerals, including uraninite (the most common uranium ore), carnotite, autunite, uranophane, torbernite, and coffinite. [12] Significant concentrations of uranium occur in some substances such as phosphate rock deposits, and minerals such as lignite , and monazite sands in uranium-rich ores [ 12 ] (it ...
Navigating the grocery aisle is overwhelming, especially when trying to make sense of food labels. Nutrition claims like “sugar-free” or “reduced fat” are hard enough to parse, even when ...
This list includes those recognised minerals beginning with the letters U and V.The International Mineralogical Association is the international group that recognises new minerals and new mineral names; however, minerals discovered before 1959 did not go through the official naming procedure, although some minerals published previously have been either confirmed or discredited since that date.