datolite


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datolite

(ˈdeɪtəˌlaɪt)
n
(Minerals) 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]
References in periodicals archive ?
In mid-2009 a single small pocket in the Bor (boron) mine at Dalnegorsk, Primorskiy Kray, produced about 100 thumbnails and a few miniatures of datolite of a quite new aspect for Dalnegorsk: highly lustrous, transparent, palest green datolite crystals to 1 cm forming pretty, loose clusters without associated species.
Although not a major producer of collector-quality specimens, it has yielded fine examples of heulandite, stilbite, calcite, chalcedony, datolite and prehnite.
Sporadic pockets, between 10 and 60 cm, commonly lined with datolite or prehnite followed by zeolites, calcite and sulfides, are distributed unevenly within this layer.
As far as is known, only one report of crystal twinning in datolite is found in the literature.
Excellent specimens of datolite have been coming for about 10 years, Alfredo says, from a road-metal quarry near the village of Erretigotti, Vizcaya (this is the Basque country of northernmost Spain), and the specimens have been circulating at Spanish mineral shows but have not been marketed internationally until now.
An article in the September-October 2000 Mineralogical Record and an update in May-June 2007 made clear that the Millington is, as regards specimens, the newest of the many "traprock" quarries of northern New Jersey, and that its beautiful natrolite, pectolite, datolite and apophyllite specimens rank among this famous area's best.
Datolite is found extremely rarely at the Fengjiashan mine, as greenish, translucent to transparent crystals reaching 7 cm.
In the Holiday Inn room of "Axinite-PM," a handful of specimens bespoke a nice single-pocket find, last July, of pink apophyllite on datolite matrix, this not from any of Dalnegorsk's metallic mines but from the nearby Bor mine, where a huge deposit of massive datolite is exploited as boron ore.
1939) described amygdules and geodes in the capping basalts, containing axinite, calcite, danburite, datolite, fluorite, goethite, hematite, pyrite, quartz, schorl and specular hematite.
The geochemically associated non-zeolite minerals prehnite, datolite and the apophyllite series were also noted at a number of localities.
Pezzotta describes the best specimens there (not only orthoclase, but also quartz, fluorite, datolite, babingtonite etc.
Fengjiashan Hubei amethyst, apophyllite, braunite, calcite, chalcopyrite, datolite, hubeite, ilvaite, inesite, japanese twins, pyrite, stilbite/stellarite, wollastonite Fenglin Jiangxi chalcocite Fengsandong Hubei amethyst, bornite, apophyllite, chalcopyrite, datolite, inesite, molybdenite, pyrite, parsettensite, stilbite Fushan Hebei vesuvianite, hematite Fushun Liaoning amber Fuyun Xinjiang, aquamarine, fluorite, garnet, hiddennite, Uygur A.