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The rare-earth elements (REE), also called the rare-earth metals or rare earths, and sometimes the lanthanides or lanthanoids (although scandium and yttrium, which do not belong to this series, are usually included as rare earths), [ 1 ] are a set of 17 nearly indistinguishable lustrous silvery-white soft heavy metals.
A rare-earth mineral contains one or more rare-earth elements as major metal constituents. Rare-earth minerals are usually found in association with alkaline to peralkaline igneous complexes in pegmatites. This would be associated with alkaline magmas or with carbonatite intrusives. Perovskite mineral phases are common hosts to rare-earth ...
Allanite (also called orthite) is a sorosilicate group of minerals within the broader epidote group that contain a significant amount of rare-earth elements. The mineral occurs mainly in metamorphosed clay-rich sediments and felsic igneous rocks. It has the general formula A 2 M 3 Si 3 O 12 [OH], where the A sites can contain large cations such ...
Rare earths are a group of 17 metals that have been deemed critical by the U.S. Geological Survey for multiple sectors in the U.S.
Nephrite is a variety of the calcium, magnesium, and iron-rich amphibole minerals tremolite or actinolite (aggregates of which also make up one form of asbestos). The chemical formula for nephrite is Ca 2 (Mg, Fe) 5 Si 8 O 22 (O H) 2. [1] It is one of two different mineral species called jade. The other mineral species known as jade is jadeite ...
China was the EU’s largest partner for imports of rare earth elements in 2022, accounting for 40% of overall imports based on weight. Looking ahead, Rare Earths Norway said that exploration work ...
The geology of Wyoming includes some of the oldest Archean rocks in North America, overlain by thick marine and terrestrial sediments formed during the Paleozoic, Mesozoic and Cenozoic, including oil, gas and coal deposits. Throughout its geologic history, Wyoming has been uplifted several times during the formation of the Rocky Mountains ...
Euxenite is used as an ore of the rare earth elements it contains. Rare large crystals have also been used in jewelry. Rare large crystals have also been used in jewelry. [ 5 ]