- rareearth elements
rare-earth elements
1> _хим. редкоземельные элементы
Новый большой англо-русский словарь. 2001.
rareearth elements
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rareearth — rare earth n. 1. Any of various oxides of the rare earth elements. 2. A rare earth element. * * * … Universalium
terbium metals — terbium metals, a group of closely related rareearth elements, consisting of terbium, dysprosium, europium, and gadolinium … Useful english dictionary
Rare earth element — Rare earth ore, shown with a United States penny for size comparison These rare … Wikipedia
Period 2 element — A period 2 element is one of the chemical elements in the second row (or period) of the periodic table of the chemical elements. The periodic table is laid out in rows to illustrate recurring (periodic) trends in the chemical behaviour of the… … Wikipedia
Lutetium — (pronEng|ljuːˈtiːʃiəm) is a chemical element with the symbol Lu and atomic number 71. A silvery white rare metal, lutetium is the heaviest member of the rare earth group.Parker, Sybil P., ed. Dictionary of Scientific and Technical Terms. 3rd ed.… … Wikipedia
Actinoid — The actinoid (according to current IUPAC terminology; previously actinide) series encompasses the 15 chemical elements that lie between actinium and lawrencium included on the periodic table, with atomic numbers 89 103. [… … Wikipedia
Boron — (pronEng|ˈbɔərɒn) is a chemical element with atomic number 5 and the chemical symbol B. Boron is a trivalent nonmetallic element which occurs abundantly in the evaporite ores borax and ulexite. Boron is never found as a free element on… … Wikipedia
Rare Earth hypothesis — In planetary astronomy and astrobiology, the Rare Earth hypothesis argues that the emergence of complex multicellular life (metazoa) on Earth required an improbable combination of astrophysical and geological events and circumstances. The term… … Wikipedia
Mount Weld — is a mountain and a mine site in Western Australia, located about 30 km south of Laverton and 120 km east of Leonora.[1] It ranks as one of the richest major rare earth deposits in the world.[2] Rare earths are contained in secondary… … Wikipedia
