boracite

American  

[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.

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boracite British  

/ ˈbɔːrəˌsaɪt /

noun

1. a white mineral that forms salt deposits of magnesium borate and chloride in orthorhombic crystalline form. Formula: Mg 3 ClB 7 O 13

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Etymology

Origin of boracite

1800–10; borac- (stem of borax ¹ ) + -ite ¹

Example Sentences

It occurs in nature also in boracite, datolite, tourmaline, and some other minerals.

From Webster's Unabridged Dictionary (2nd 100 Pages) by Webster, Noah

When such water evaporates, it becomes concentrated, along with the magnesium and potassium salts, in the "mother liquor"; and upon complete evaporation, it crystallizes out as boracite and other rarer minerals.

From The Economic Aspect of Geology by Leith, C. K. (Charles Kenneth)

For example, boracite forms pseudo-cubic crystals which become truly cubic at 265�, with a distinct change in density; leucite behaves similarly at about 560�.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" by Various

It may also be obtained by the decomposition of boracite with hot hydrochloric acid.

From Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3 "Borgia, Lucrezia" to "Bradford, John" by Various

Chemically, boracite is a magnesium borate and chloride with the formula Mg7Cl2B16O30—A small amount of iron is sometimes present, and an iron-boracite with half the magnesium replaced by ferrous iron has been called huyssenite.

From Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 2 "Bohemia" to "Borgia, Francis" by Various