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colemanite

[ kohl-muh-nahyt ]

noun

  1. a mineral, hydrous calcium borate, Ca 2 B 6 O 11 ⋅5H 2 O, occurring in colorless or milky-white crystals.


colemanite

/ ˈkəʊlməˌnaɪt /

noun

  1. a colourless or white glassy mineral consisting of hydrated calcium borate in monoclinic crystalline form. It occurs with and is a source of borax. Formula: Ca 2 B 6 O 11 .5H 2 O
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Word History and Origins

Origin of colemanite1

Named in 1884 after W. T. Coleman of San Francisco, in whose mine it was found; -ite 1
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Word History and Origins

Origin of colemanite1

C19: named after William T. Coleman (1824–93), American pioneer, owner of the mine in which it was discovered
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Example Sentences

The salts contained in these deposits are mainly borax, ulexite, and colemanite.

The colemanite occurs in irregular milky-white layers or nodules, mingled with more or less gypsum.

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