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fluorite
fluorite (fluorspar, Blue John) Mineral, CaF2;sp. gr. 3.2; hardness 4; cubic; often yellow, green, blue, or purple, but can be colourless, pink, red, or black, and often colour banded; white streak; vitreous lustre; crystals often cubes, but can be octahedra and rhombdodecahedra, and a mixture of forms; cleavage perfect {111}; widely distributed in mineral veins alone or as a gangue mineral with metallic ores, and in association with quartz, barite, calcite, galena, cassiterite, sphalerite, and many other minerals; soluble in sulphuric acid with the evolution of hydrogen sulphide. It is used extensively as a flux in the smelting of iron, in the ceramic industry, and in the chemical industry. The deep-purple, banded variety, Blue John, is used as an ornamental stone.
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Cite this article
AILSA ALLABY and MICHAEL ALLABY. "fluorite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "fluorite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O13-fluorite.html AILSA ALLABY and MICHAEL ALLABY. "fluorite." A Dictionary of Earth Sciences. 1999. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-fluorite.html |
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fluorite
fluorite Calcium fluoride crystal, used as an optical material. Objective lenses made from fluorite are particularly free from chromatic aberration, since fluorite has approximately half the dispersion of crown glass. Its drawbacks are that it is very expensive and is attacked by water, so fluorite elements must be sealed between other elements.
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"fluorite." A Dictionary of Astronomy. 1997. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. "fluorite." A Dictionary of Astronomy. 1997. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O80-fluorite.html "fluorite." A Dictionary of Astronomy. 1997. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O80-fluorite.html |
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fluorite
fluorite (fluorspar) Mineral, calcium fluoride (CaF2). It has cubic system crystals with granular and fibrous masses. Brittle and glassy, it can be yellow, purple or green. It is used as a flux in steel production and in ceramics and chemical industries. Hardness 4; r.d. 3.1.
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"fluorite." World Encyclopedia. 2005. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. "fluorite." World Encyclopedia. 2005. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O142-fluorite.html "fluorite." World Encyclopedia. 2005. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O142-fluorite.html |
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fluorite
fluo·rite / ˈfloŏrˌīt; flôr-/ • n. a mineral consisting of calcium fluoride that typically occurs as cubic crystals, colorless when pure but often colored by impurities. |
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"fluorite." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. "fluorite." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O999-fluorite.html "fluorite." The Oxford Pocket Dictionary of Current English. 2009. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-fluorite.html |
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fluorite
fluorite
•Hamite, samite
•marmite • Semite • Vegemite
•eremite • Hashemite • Fatimite
•chromite • Edomite • sodomite
•stalagmite • Elamite • dolomite
•Adullamite • dynamite • catamite
•Benthamite
•termite, thermite
•Samnite • sennight • midnight
•lignite • selenite • gelignite
•kaolinite • Leninite
•finite, transfinite
•watchnight • fortnight • Sunnite
•exurbanite, suburbanite, urbanite
•manganite • ammonite • Mennonite
•Canaanite • Maronite • bentonite
•Irvingite • respite • alexandrite
•Arkwright • cartwright • nephrite
•playwright • wainwright
•wheelwright • millwright
•shipwright • copyright • Nazirite
•pyrite • eyebright • nitrite • contrite
•chlorite • forthright • downright
•Fulbright • upright • meteorite
•diorite • fluorite
•Labourite (US Laborite) • sybarite
•Thatcherite • phosphorite • azurite
•anchorite • Hitlerite • dolerite
•Amorite • Minorite • laterite
•Hutterite • birthright
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Cite this article
"fluorite." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. "fluorite." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O233-fluorite.html "fluorite." Oxford Dictionary of Rhymes. 2007. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-fluorite.html |
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