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glaucophane
glaucophane An important alkali amphibole of composition Na2(Mg3Al2)[Si8O22] (OH)2, and end-member of the glaucophane—riebeckite (Na2(Fe2+3Fe3+2)[Si8O22] (OH)2 series; sp. gr. 3.0; hardness 6.0; blue, bluish-black; prismatic crystals, fibrous or granular habit; it is an essential mineral of blueschists under conditions of low temperature and high pressure in metamorphosed sediments at destructive plate margins.
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Cite this article
AILSA ALLABY and MICHAEL ALLABY. "glaucophane." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "glaucophane." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O13-glaucophane.html AILSA ALLABY and MICHAEL ALLABY. "glaucophane." A Dictionary of Earth Sciences. 1999. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-glaucophane.html |
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glaucophane
glaucophane : see amphibole . |
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Cite this article
"glaucophane." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. "glaucophane." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1E1-X-glaucoph.html "glaucophane." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-X-glaucoph.html |
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