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boracite

[bawr-uh-sahyt, bohr-] /ˈbɔr əˌsaɪt, ˈboʊr-/
noun
1.
a strongly pyroelectric mineral, a borate and chloride of magnesium, Mg 6 Cl 2 B 14 O 26 , occurring in white or colorless cubic crystals or fine-grained masses.
Origin of boracite
1800-1810
1800-10; borac- (stem of borax1) + -ite1
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for boracite

boracite

/ˈbɔːrəˌsaɪt/
noun
1.
a white mineral that forms salt deposits of magnesium borate and chloride in orthorhombic crystalline form. Formula: Mg3ClB7O13
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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