- rare earth compound
- Солнечная энергия: редкоземельное соединение
Универсальный англо-русский словарь. Академик.ру. 2011.
rare earth compound
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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
Earth (chemistry) — The chemical term earths was historically applied to certain chemical substances, once thought to be elements, and this name was borrowed from one of the four classical elements of Plato. Earths later turned out to be chemical compounds, albeit… … Wikipedia
Compound lever — Nail clippers are a simple form of compound lever The compound lever is a simple machine operating on the premise that the resistance from one lever in a system of levers will act as power for the next, and thus the applied force will be… … Wikipedia
Alkaline earth metal — Group 2 Period 2 4 Be 3 … Wikipedia
coordination compound — Chem. complex (def. 10). Also called coordination complex. * * * ▪ chemistry Introduction any of a class of substances with chemical structures in which a central metal atom is surrounded by nonmetal atoms or groups of atoms, called ligands… … Universalium
Minor places in Middle-earth — Middle earth portal The stories of J. R. R. Tolkien s Middle earth legendarium contain references to numerous places. Some of these places are described below. See also: Minor places in Arda, Minor places in Beleriand, List o … Wikipedia
organohalogen compound — Introduction any of a class of organic compounds (organic compound) that contain at least one halogen (halogen element) ( fluorine [F], chlorine [Cl], bromine [Br], or iodine [I]) bonded to carbon. They are subdivided into alkyl, vinylic, aryl,… … Universalium
intensifying screen — A plastic sheet impregnated with a rare earth compound, such as calcium tungstate, which reacts to radiation by emitting light. When placed on one side of a piece of X ray film with a radioactive sample on the other side, the intensifying screen… … Glossary of Biotechnology
Crystal structure of boron-rich metal borides — Two single crystals of YB66 (1 cm diameter) grown by floating zone technique using (100) oriented seeds. In the top crystal, the seed (left from the black line) has same diameter as the crystal. In the bottom crystal (sliced), the seed is much… … Wikipedia
chemical element — Introduction also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed. This article considers the… … Universalium
