Definitions for datolite

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Wiktionary

  1. datolite(Noun)

    A borosilicate of lime commonly occurring in glassy, greenish crystals, with the chemical formula CaBSiO(OH).

  2. Origin: From δατέομαι + -lite; in allusion to the granular structure of a massive variety

Webster Dictionary

  1. Datolite(noun)

    a borosilicate of lime commonly occuring in glassy,, greenish crystals

Freebase

  1. Datolite

    Datolite is a calcium boron hydroxide nesosilicate, CaBSiO4. It was first observed by Jens Esmark in 1806, and named by him from δατεῖσθαι, "to divide," and λίθος, "stone," in allusion to the granular structure of the massive mineral. Datolite crystallizes in the monoclinic system forming prismatic crystals and nodular masses. The luster is vitreous and may be brown, yellow, light green or colorless. The Mohs hardness is 5.5 and the specific gravity is 2.8 - 3.0. The type localities are in the diabases of the Connecticut River valley and Arendal, Aust-Agder, Norway. Associated minerals include prehnite, danburite, babingtonite, epidote, native copper, calcite, quartz and zeolites. It is common in the copper deposits of the Lake Superior region of Michigan. It occurs as a secondary mineral in mafic igneous rocks often filling vesicles along with zeolites in basalt. Unlike most localities throughout the world, the occurrence of datolite in the Lake Superior region is usually fine grained in texture and possesses colored banding. Much of the coloration is due to the inclusion of copper or associated minerals in progressive stages of hydrothermal precipitation. Botryolite is a botryoidal form of datolite.

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