rare-earth ores

См. также в других словарях:

• rare-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 …   Universalium

• Rare earth element — Rare earth ore, shown with a United States penny for size comparison These rare …   Wikipedia

• rare-earth metal ores — Смотри руды редкоземельных металлов …   Энциклопедический словарь по металлургии

• Indian Rare Earths Limited — On August 18 1950, Indian Rare Earths Limited (IREL) was incorporated as a private limited company jointly owned by the Government of India and Government of Travancore, Cochin with the primary intention of taking up commercial scale processing… …   Wikipedia

• Age of the Earth — This article is about scientific estimates of the age of the Earth. For religious and other non scientific estimates, see Dating Creation. Earth as seen from Apollo 17 The age of the Earth is 4.54 billion years (4.54 × 109 years ± 1%) …   Wikipedia

• Scandium — (pronEng|ˈskændiəm) is a chemical element that has the symbol Sc and atomic number 21. A silvery white metal that is always present as compounds, scandium ores occur as rare minerals from Scandinavia and elsewhere, and it is sometimes considered… …   Wikipedia

• scandium — /skan dee euhm/, n. Chem. a rare, trivalent, metallic element obtained from thortveitite. Symbol: Sc; at. wt.: 44.956; at. no.: 21; sp. gr.: 3.0. [1875 80; < NL; see SCANDIA, IUM] * * * ▪ chemical element  (Sc), chemical element, rare earth metal …   Universalium

• yttrium — yttric, adj. /i tree euhm/, n. Chem. a rare trivalent metallic element, found in gadolinite and other minerals. Symbol: Y; at. wt.: 88.905; at. no.: 39; sp. gr.: 4.47. Cf. rare earth element. [1815 25; < NL, named after Ytterby. See YTTERBIA,… …   Universalium

• Apatite — Not to be confused with appetite. Apatite General Category Phosphate mineral group Chemical form …   Wikipedia

• Order For Brave Miners' Work — First, Second, and Third class ribbon bars of the order …   Wikipedia

• руды редкоземельных металлов — [rare earth metal ores] природные минеральные образования, содержащие РЗМ в виде собственных минералов либо изоморфных примесей в некоторых других минералах. Изв > 70 собственных РЗ минералов и около 280 минералов, в которых РЗМ входят в качестве …   Энциклопедический словарь по металлургии