/thawr"uyt, thohr"-/, n.
a rare mineral, thorium silicate, ThSiO4, occurring in the form of yellow or black crystals.
[1825-35; thor- (as in THORIA, THORIUM) + -ITE1, modeled on Sw thorit]

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      thorium silicate, ThSiO4, one of the most important thorium minerals. Almost always altered by hydration, it occurs in syenite near Brevik, Nor., and in the gem gravels of Sri Lanka. Thorite is mined commercially in the United States at Cripple Creek, Colo., and at Hall Mountain, Idaho. Although the mineral is usually light brown, an orange-yellow gem variety known as orangite occurs in Madagascar. For detailed physical properties, see silicate mineral (table).

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Universalium. 2010.

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  • Thorite — Thorite, (Th,U)SiO4, is a rare nesosilicate of thorium that crystallizes in the tetragonal system and is isomorphous with zircon. It is the most common mineral of thorium and is nearly always strongly radioactive. It was named in 1829 to reflect… …   Wikipedia

  • thorite — [ tɔrit ] n. f. • 1838; de thorium ♦ Minér. Silicate naturel de thorium (ThSiO4), brun orange. ● thorite nom féminin Silicate naturel de thorium, de formule ThSiO4, quadratique. ● thorite (synonymes) nom féminin Silicate naturel de thorium, de… …   Encyclopédie Universelle

  • Thorite — Tho rite, n. [So called by Berzelius from the Scandinavian god Thor. See {Thor}.] (Min.) A mineral of a brown to black color, or, as in the variety orangite, orange yellow. It is essentially a silicate of thorium. [1913 Webster] …   The Collaborative International Dictionary of English

  • thorite — [thôr′īt΄] n. [Swed thorit: see THORIUM & ITE1] a rare, usually dark, hard, radioactive mineral, thorium silicate, ThSiO4, that is usually hydrated …   English World dictionary

  • thorite — toritas statusas T sritis chemija apibrėžtis Mineralas. formulė ThSiO₄ atitikmenys: angl. thorite rus. торит …   Chemijos terminų aiškinamasis žodynas

  • thorite — noun Etymology: Swedish thorit, from New Latin thorium Date: 1832 a rare mineral that is a brown to black or sometimes orange yellow silicate of thorium resembling zircon …   New Collegiate Dictionary

  • thorite — noun A radioactive mineral, composed mostly of thorium silicate (ThSiO), along with silicates of uranium and the rare earths …   Wiktionary

  • thorite — (to ri t ) s. f. Minéral trouvé en Norwége, près Brevig, sur l île de Loeven ; on en extrait le thorium …   Dictionnaire de la Langue Française d'Émile Littré

  • thorite — tho·rite …   English syllables

  • thorite — tho•rite [[t]ˈθɔr aɪt, ˈθoʊr [/t]] n. mir a rare radioactive mineral ore, thorium silicate, ThSiO4, occurring as grains and crystals • Etymology: < Sw thorit (1829); see thorium, ite I …   From formal English to slang

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