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Chabazite is a tectosilicate mineral of the zeolite group with formula: (Ca,Na2,K2,Mg)Al2Si4O12·6H2O. Recognized varieties include Chabazite-Ca, Chabazite-K, Chabazite-Na, and Chabazite-Sr depending on the prominence of the indicated cation.
Chabazite crystallizes in the trigonal crystal system with typically rhombohedral shaped crystals that are pseudo-cubic. The crystals are typically twinned, and both contact twinning and penetration twinning may be observed. They may be colorless, white, orange, brown, pink, green, or yellow. The hardness ranges from 3 to 5 and the specific gravity from 2.0 to 2.2. The luster is vitreous.
It was named chabasie in 1792 by Bosc d'Antic and later changed to the current spelling.
Chabazite occurs most commonly in voids and amygdules in basaltic rocks.
Chabazite is found in India, Iceland, the Faroe Islands, the Giants Causeway in Northern Ireland, Bohemia, Italy, Germany, along the Bay of Fundy in Nova Scotia, Oregon, Arizona, and New Jersey.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Chabazite". A list of authors is available in Wikipedia.|