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

datolitic [dat-l-it-ik] , adjective
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World English Dictionary
datolite (ˈdeɪtəˌlaɪt)
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)
[C19: dato- from Greek dateisthai to divide + -lite]

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Encyclopedia Britannica


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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