colemanite

/kohl"meuh nuyt'/, n.
a mineral, hydrous calcium borate, Ca2B6O11·5H2O, occurring in colorless or milky-white crystals.
[named in 1884 after W. T. Coleman of San Francisco, in whose mine it was found; see -ITE1]

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 borate mineral, hydrated calcium borate (Ca2B6O11·5H2O) that was the principal source of borax until the 1930s. It typically occurs as colourless, brilliant crystals and masses in Tertiary sediments (those formed 66.4 to 1.6 million years ago), where it has been derived from ulexite and borax. The chief localities are the Kramer district, Death Valley, and Daggett, Calif. Colemanite is an important source of commercial borates and boric acid. For detailed physical properties, see borate mineral (table). See also borax.

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Universalium. 2010.

Look at other dictionaries:

  • Colémanite — Colémanite[1] Catégorie VI : borates[2] Colémanite …   Wikipédia en Français

  • Colemanite — Colémanite Colémanite Catégorie VI : borates Colémanite …   Wikipédia en Français

  • Colemanite — Cole man*ite, n. [From W.T. Coleman of San Francisco.] (Min.) A hydrous borate of lime occurring in transparent colorless or white crystals, also massive, in Southern California. [1913 Webster] …   The Collaborative International Dictionary of English

  • colemanite — ☆ colemanite [kōl′mən īt΄ ] n. [after W. T. Coleman (1824 93), U.S. manufacturer of borax] a white or colorless, monoclinic mineral, Ca2B6O11·5H2O, that is an ore of boron; hydrous calcium borate …   English World dictionary

  • Colemanite — For the community in California formerly named Colemanite, see Ryan, California. Colemanite General Category Inoborates …   Wikipedia

  • colemanite — kolemanitas statusas T sritis chemija apibrėžtis Mineralas. formulė Ca[B₃O₄(OH)₃]·H₂O atitikmenys: angl. colemanite rus. колеманит …   Chemijos terminų aiškinamasis žodynas

  • colemanite — noun Etymology: William T. Coleman died 1893 American businessman and mine owner Date: 1884 a colorless or white mineral consisting of a hydrous calcium borate occurring in monoclinic crystals …   New Collegiate Dictionary

  • colemanite — noun A white, grey or colorless mineral form of calcium borate; a principal source of boron …   Wiktionary

  • colemanite — cole·man·ite …   English syllables

  • colemanite — cole•man•ite [[t]ˈkoʊl məˌnaɪt[/t]] n. mir a mineral, hydrous calcium borate, Ca2B6O11∙5H2O, occurring in colorless or milky white crystals • Etymology: 1884; after W. T. Coleman of San Francisco, in whose mine it was found …   From formal English to slang

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