Cordierite - Revision history

MDerrick at 18:16, 5 July 2022

2022-07-05T18:16:16Z

← Older revision		Revision as of 14:16, 5 July 2022
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	[[File:cordieriteanthophylarge.jpg\|thumb\|Cordierite]]		[[File:cordieriteanthophylarge.jpg\|thumb\|Cordierite]]

	== Synonyms and Related Terms ==		== Synonyms and Related Terms ==

	cordierita (Esp.); cordierite (Port.); Cordierit (Deut.); cordieriet (Ned.)		cordierita (Esp.); cordierite (Port.); Cordierit (Deut.); cordieriet (Ned.)

	[[[SliderGallery rightalign\|cordieriteRS.jpg~Raman]]]		[[[SliderGallery rightalign\|cordieriteRS.jpg~Raman]]]

	== ~~Other~~ Properties ==		==Physical and Chemical Properties==

	Orthorhombic crystals but usually massive with embedded grains. Good cleavage in one direction. Fracture = conchoidal to uneven. Luster = vitreous. Streak = colorless. Strongly dichroic from yellowish brown to blue at 90 degrees		* Orthorhombic crystals but usually massive with embedded grains.
			* Good cleavage in one direction.
			* Fracture = conchoidal to uneven.
			* Luster = vitreous.
			* Streak = colorless.
			* Strongly dichroic from yellowish brown to blue at 90 degrees

	{\| class="wikitable"		{\| class="wikitable"
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	\|-		\|-
	! scope="row"\| Density		! scope="row"\| Density
	\| 2.5-2.8		\| 2.5-2.8 g/ml
	\|-		\|-
	! scope="row"\| Refractive Index		! scope="row"\| Refractive Index
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	\|}		\|}

	== ~~Additional Information~~ ==		==Resources and Citations==

	~~Mineralogy Database: [http://www.webmineral.com/data/Cordierite.shtml Cordierite]~~

	~~== Sources Checked for Data in Record ==~~		* Mineralogy Database: [http://www.webmineral.com/data/Cordierite.shtml Cordierite]

	* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p.794		* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p.794
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	* R.F.Symmes, T.T.Harding, Paul Taylor, ''Rocks, Fossils and Gems'', DK Publishing, Inc., New York City, 1997		* R.F.Symmes, T.T.Harding, Paul Taylor, ''Rocks, Fossils and Gems'', DK Publishing, Inc., New York City, 1997

	* ''Encyclopedia Britannica'', http://www.britannica.com Comment: "cordierite" ~~Encyclopædia Britannica~~ [Accessed December 11, 2001]. (color photo)(tech info)		* ''Encyclopedia Britannica'', http://www.britannica.com Comment: "cordierite" [Accessed December 11, 2001]. (color photo)(tech info)

	* C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979		* C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979

	* Wikipedia~~, the free encyclopedia, at http://www.wikipedia.com Comment~~: http://en.wikipedia.org/wiki/Cordierite (Accessed Sept. 7, 2005)		* Wikipedia: http://en.wikipedia.org/wiki/Cordierite (Accessed Sept. 7, 2005)

	* ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998		* ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998

Jruggiero: Text replace - "== Authority ==" to "== Sources Checked for Data in Record =="

2016-04-29T20:20:56Z

Text replace - "== Authority ==" to "== Sources Checked for Data in Record =="

← Older revision		Revision as of 16:20, 29 April 2016
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	Mineralogy Database: [http://www.webmineral.com/data/Cordierite.shtml Cordierite]		Mineralogy Database: [http://www.webmineral.com/data/Cordierite.shtml Cordierite]

	== ~~Authority~~ ==		== Sources Checked for Data in Record ==

	* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p.794		* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p.794

GEthier: /* Description */

2014-01-13T18:03:18Z

Description

← Older revision		Revision as of 14:03, 13 January 2014
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	== Description ==		== Description ==

	A strongly dichroic, transparent crystal that is occasionally used as a [~~http://cameo.mfa.org/materials/fullrecord.asp?name=gemstone~~ gemstone]. Cordierite is a silicate of [~~http://cameo.mfa.org/materials/fullrecord.asp?name=magnesium~~ magnesium], [~~http://cameo.mfa.org/materials/fullrecord.asp?name=aluminum~~ aluminum], and sometimes [~~http://cameo.mfa.org/materials/fullrecord.asp?name=iron~~ iron]. It exhibits a dark, purplish-blue color from one direction and a pale yellowish gray color when turned 90 degrees. Cordierite is thought to be the sunstone whose strong polarizing effects were used by the Vikings to navigate their boats. Gem quality stones are mined in northern Europe, Sri Lanka, Myanmar, Madagascar, India, Canada, and the U.S. (Alaska, Wyoming, Connecticut). Cordierite is made synthetically at high temperatures from [~~http://cameo.mfa.org/materials/fullrecord.asp?name=clay~~ clay], [~~http://cameo.mfa.org/materials/fullrecord.asp?name=talc~~ talc], and [~~http://cameo.mfa.org/materials/fullrecord.asp?name=alumina~~ alumina].		A strongly dichroic, transparent crystal that is occasionally used as a [[gemstone]]. Cordierite is a silicate of [[magnesium]], [[aluminum]], and sometimes [[iron]]. It exhibits a dark, purplish-blue color from one direction and a pale yellowish gray color when turned 90 degrees. Cordierite is thought to be the sunstone whose strong polarizing effects were used by the Vikings to navigate their boats. Gem quality stones are mined in northern Europe, Sri Lanka, Myanmar, Madagascar, India, Canada, and the U.S. (Alaska, Wyoming, Connecticut). Cordierite is made synthetically at high temperatures from [[clay]], [[talc]], and [[alumina]].

	[[File:cordieriteanthophylarge.jpg\|thumb\|Cordierite]]		[[File:cordieriteanthophylarge.jpg\|thumb\|Cordierite]]

	== Synonyms and Related Terms ==		== Synonyms and Related Terms ==

Unknown user at 12:40, 24 July 2013

2013-07-24T12:40:50Z

← Older revision		Revision as of 08:40, 24 July 2013
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	== Authority ==		== Authority ==

	* ~~G.S.Brady,~~ G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p.794		* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p.794

	* ~~Jack Odgen,~~ Jack Odgen, ''Jewellery of the Ancient World'', Rizzoli International Publications Inc., New York City, 1982		* Jack Odgen, ''Jewellery of the Ancient World'', Rizzoli International Publications Inc., New York City, 1982

	* ~~Robert Fournier,~~ Robert Fournier, ''Illustrated Dictionary of Practical Pottery'', Chilton Book Company, Radnor, PA, 1992		* Robert Fournier, ''Illustrated Dictionary of Practical Pottery'', Chilton Book Company, Radnor, PA, 1992

	* ~~R.F.Symmes, T.T.Harding, Paul Taylor,~~ R.F.Symmes, T.T.Harding, Paul Taylor, ''Rocks, Fossils and Gems'', DK Publishing, Inc., New York City, 1997		* R.F.Symmes, T.T.Harding, Paul Taylor, ''Rocks, Fossils and Gems'', DK Publishing, Inc., New York City, 1997

	* ''Encyclopedia Britannica'', http://www.britannica.com Comment: "cordierite" ~~Encyclopdia~~ Britannica [Accessed December 11, 2001]. (color photo)(tech info)		* ''Encyclopedia Britannica'', http://www.britannica.com Comment: "cordierite" Encyclopædia Britannica [Accessed December 11, 2001]. (color photo)(tech info)

	* ~~C.W.Chesterman, K.E.Lowe,~~ C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979		* C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979

	* Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Cordierite (Accessed Sept. 7, 2005)		* Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Cordierite (Accessed Sept. 7, 2005)

Unknown user at 18:18, 27 April 2013

2013-04-27T18:18:24Z

New page

[[File:pc30208cordierite.jpg|thumb|Cordierite]]
== Description ==

A strongly dichroic, transparent crystal that is occasionally used as a [http://cameo.mfa.org/materials/fullrecord.asp?name=gemstone gemstone]. Cordierite is a silicate of [http://cameo.mfa.org/materials/fullrecord.asp?name=magnesium magnesium], [http://cameo.mfa.org/materials/fullrecord.asp?name=aluminum aluminum], and sometimes [http://cameo.mfa.org/materials/fullrecord.asp?name=iron iron]. It exhibits a dark, purplish-blue color from one direction and a pale yellowish gray color when turned 90 degrees. Cordierite is thought to be the sunstone whose strong polarizing effects were used by the Vikings to navigate their boats. Gem quality stones are mined in northern Europe, Sri Lanka, Myanmar, Madagascar, India, Canada, and the U.S. (Alaska, Wyoming, Connecticut). Cordierite is made synthetically at high temperatures from [http://cameo.mfa.org/materials/fullrecord.asp?name=clay clay], [http://cameo.mfa.org/materials/fullrecord.asp?name=talc talc], and [http://cameo.mfa.org/materials/fullrecord.asp?name=alumina alumina].

[[File:cordieriteanthophylarge.jpg|thumb|Cordierite]]
== Synonyms and Related Terms ==

cordierita (Esp.); cordierite (Port.); Cordierit (Deut.); cordieriet (Ned.)

[[[SliderGallery rightalign|cordieriteRS.jpg~Raman]]]

== Other Properties ==

Orthorhombic crystals but usually massive with embedded grains. Good cleavage in one direction. Fracture = conchoidal to uneven. Luster = vitreous. Streak = colorless. Strongly dichroic from yellowish brown to blue at 90 degrees

{| class="wikitable"
|-
! scope="row"| Composition
| (Mg, Fe)2Al4Si5O18
|-
! scope="row"| Mohs Hardness
| 7 - 7.5
|-
! scope="row"| Density
| 2.5-2.8
|-
! scope="row"| Refractive Index
| 1.53; 1.55; 1.55
|}

== Additional Information ==

Mineralogy Database: [http://www.webmineral.com/data/Cordierite.shtml Cordierite]

== Authority ==

* G.S.Brady, G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p.794

* Jack Odgen, Jack Odgen, ''Jewellery of the Ancient World'', Rizzoli International Publications Inc., New York City, 1982

* Robert Fournier, Robert Fournier, ''Illustrated Dictionary of Practical Pottery'', Chilton Book Company, Radnor, PA, 1992

* R.F.Symmes, T.T.Harding, Paul Taylor, R.F.Symmes, T.T.Harding, Paul Taylor, ''Rocks, Fossils and Gems'', DK Publishing, Inc., New York City, 1997

* ''Encyclopedia Britannica'', http://www.britannica.com Comment: "cordierite" Encyclopdia Britannica [Accessed December 11, 2001]. (color photo)(tech info)

* C.W.Chesterman, K.E.Lowe, C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979

* Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Cordierite (Accessed Sept. 7, 2005)

* ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998

[[Category:Materials database]]