- rare earth elements
- elements of the lanthanum series, comprising elements with atomic numbers 57 to 71.
Medical dictionary. 2011.
rare earth elements
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rare-earth elements — retųjų žemių elementai statusas T sritis chemija apibrėžtis Sc, Y, La ir lantanoidai. atitikmenys: angl. rare earths; rare earth elements rus. редкие земли; редкоземельные элементы ryšiai: sinonimas – retosios žemės … Chemijos terminų aiškinamasis žodynas
rare-earth elements — lantanoidai statusas T sritis chemija apibrėžtis Cheminių elementų grupė nuo Ce iki Lu. atitikmenys: angl. lanthanides; lanthanoides; lanthanous; rare earth elements rus. лантаниды; лантаноиды … Chemijos terminų aiškinamasis žodynas
Abundance of the naturally occurring rare-earth elements — ▪ Table Abundance of the naturally occurring rare earth elements (parts per million) element Earth s crust average of 20 chondritic meteorites composite of 40 North American shales western North American Precambrian granites Kilauea basalt rank*… … Universalium
Some properties of the rare-earth elements (values recommended by Ames Laboratory) part I — ▪ Table Some properties of the rare earth elements (values recommended by Ames Laboratory) part I scandium yttrium lanthanum cerium atomic number 21 39 57 58 atomic weight 44.956 88.905 138.91 140.12 colour of element silvery silvery silvery… … Universalium
rare-earth elements — Смотри редкоземельные элементы … Энциклопедический словарь по металлургии
Rare earth element — Rare earth ore, shown with a United States penny for size comparison These rare … Wikipedia
rare earth — n. 1. any of certain basic oxides much alike in physical and chemical properties; specif., any of the oxides of the rare earth elements 2. any of the rare earth elements … English World dictionary
rare earth — rare′ earth′ n. chem. the oxide of any of the rare earth elements contained in various minerals • Etymology: 1875–80 … From formal English to slang
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 — noun any element of the lanthanide series (atomic numbers 57 through 71) (Freq. 1) • Syn: ↑rare earth element, ↑lanthanoid, ↑lanthanide, ↑lanthanon • Hypernyms: ↑group, ↑grouping … Useful english dictionary
