boracite


boracite
/bawr"euh suyt', bohr"-/, n.
a strongly pyroelectric mineral, a borate and chloride of magnesium, Mg6Cl2B14O26, occurring in white or colorless cubic crystals or fine-grained masses.
[1800-10; borac- (s. of BORAX1) + -ITE1]

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      colourless, glassy borate mineral, magnesium chloroborate (Mg3B7O13Cl). It has been found as crystals embedded in sedimentary deposits of anhydrite, gypsum, and halite. A massive variety occurs as nodules in the salt-dome deposits at Stassfurt, Ger., where it has been mined as a source of boron. For detailed physical properties, see borate mineral (table).

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Universalium. 2010.