rare-earth elements minerals
1rare-earth elements minerals — Смотри Минералы редкоземельных элементов …
2Rare earth element — Rare earth ore, shown with a United States penny for size comparison These rare …
3rare earth — rare′ earth′ n. chem. the oxide of any of the rare earth elements contained in various minerals • Etymology: 1875–80 …
4rare-earth element — /rair errth /, Chem. any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare earth metal. [1955 …
5rare earth — noun any element of the lanthanide series (atomic numbers 57 through 71) (Freq. 1) • Syn: ↑rare earth element, ↑lanthanoid, ↑lanthanide, ↑lanthanon • Hypernyms: ↑group, ↑grouping …
6Rare-earth mineral — A rare earth mineral is a mineral whose principal element is a rare earth element. Yttrium is found in almost all rare earth minerals. Rare earth minerals are usually found in association with alkaline to per alkaline igneous complexes, in… …
7rare earth — Chem. the oxide of any of the rare earth elements contained in various minerals. [1875 80] * * * …
8Mountain Pass rare earth mine — The Mountain Pass mine surface facilities. The upper part of the open pit is seen in the background. Location …
9rare earth metal — Any of a large class of chemical elements including scandium (atomic number 21), yttrium (39), and the 15 elements from 57 (lanthanum) to 71 (see lanthanides). The rare earths themselves are pure or mixed oxides of these metals, originally… …
10Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …
