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[dat-l-ahyt] /ˈdæt lˌaɪt/
a mineral, calcium and boron silicate, CaB(SiO 4)(OH), usually occurring in rock cavities in the form of colorless, prismatic crystals.
1800-10; < German Datolith, equivalent to Greek dat(eîsthai) to divide, share out + -o- + German -lith; see -lite
Related forms
[dat-l-it-ik] /ˌdæt lˈɪt ɪk/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for datolite


a colourless mineral consisting of a hydrated silicate of calcium and boron in monoclinic crystalline form, occurring in cavities in igneous rocks. Formula: CaBSiO4(OH)
Word Origin
C19: dato- from Greek dateisthai to divide + -lite
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Encyclopedia Article for datolite

an uncommon mineral, calcium borosilicate, CaBSiO4(OH), that occurs as white or colourless veins and cavity linings in basic igneous rocks and in metallic-ore veins. Some notable deposits exist in the United States: Westfield, Mass.; Bergen Hill, N.J.; and the Lake Superior copper district. Others have been found in Norway, various places in Italy, and Tasmania. For detailed physical properties, see silicate mineral (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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