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Topic: Cordierite

	Brevier Technical Ceramics
		Cordierite materials and others based on it are magnesium aluminosilicates, fabricated by sintering soapstone or talcum with the addition of clay, kaolin, fireclay, corundum and mullite.
		A simplified approximation to the composition of pure ceramic cordierite is approx.
		Cordierite materials, moreover, behave inertly towards heating element alloys at temperatures up to 1,000°C or even 1,200 °C (there is no reaction between the heating element and the ceramic).
	www.keramverband.de /brevier_engl/3/4/1/3_4_1_3.htm (227 words)

	Process for preparing cordierite - Patent 5089456
		Cordierite ceramics having a high thermal impact resistance have hitherto been used for honeycomb carriers widely used as exhaust gas cleaning catalysts for automobiles and carriers for combustion catalysts of domestic fan heaters.
		A cordierite suitable for practical use may be prepared when the aluminum compound and the magnesium compound are used in respective amounts of 0.7 to 1 mol and 0.3 to 0.5 mol per mole of the silicon compound.
		However, in order to prepare a pure cordierite having a composition of Mg.sub.2 Al.sub.4 Si.sub.5 O.sub.18, it is preferred to use the aluminum compound and the magnesium compound in respective amounts of 0.8 mol and 0.4 mol per mole of the silicon compound.
	www.freepatentsonline.com /5089456.html (4426 words)

	CORDIERITE (Magnesium Aluminum Silicate)
		Cordierite is not a well known or popular mineral for mineral collectors.
		Only a few minerals such as cordierite and the zoisite variety called tanzanite are extremely pleochroic and it is very easy to see the color changes.
		The strong pleochroism is the reason that cordierite and iolite are sometimes referred to by the synonym dichroite a greek word meaning two colored rock.
	mineral.galleries.com /minerals/silicate/cordieri/cordieri.htm (334 words)

	Cordierite ceramic filter - Patent 6261982
		As a cordierite aggregate, a blend having magnesia, alumina and silica sand blended to have a cordierite composition of 2MgO.2Al.sub.2 O.sub.3.5SiO.sub.2, was electrically melted by means of carbon electrodes, and the obtained melt was poured into water and quenched to obtain a glass having the cordierite composition.
		Hereinafter, the cordierite having a particle size of at least 74.mu.m added as an aggregate, will be referred to as coarse particles of cordierite, and the cordierite having a particle size of less than 74.mu.m added as a binder, will be referred to as a fine powder of cordierite, for distinction.
		The cordierite ceramic filter of the present invention has been found to be excellent in strength and thermal shock resistance and has a small ventilation pressure loss by the control of the micro structure of ceramics, and thus it is particularly suitable for removal of dust in a high temperature gas.
	www.freepatentsonline.com /6261982.html (2459 words)

	Cordierite Page from Quartz 'N' All - High Quality Crystals, Minerals and Fossils
		For examples of Cordierite, that you can view and purchase safely on-line click here to navigate to our F - I page where we currently have stocks of Iolite, a member of the Cordierite family.
		The variety of Cordierite, dichroite, may appear yellow, or deep blue according to the way in which it is viewed, whilst the violet coloured variety is called Iolite.
		Cordierite when seen in granular form can be mistaken for quartz.
	www.quartznall.co.uk /learncordierite.htm (341 words)

	Cordierite Ceramics - Cordierite Tubes - Saxonburg Ceramics (Site not responding. Last check: )
		Cordierite ceramics are recommended for use in applications where thermal shock resistance is desired.
		Cordierite ceramics have a very low coefficient of thermal expansion and consequently excellent resistance to thermal shock.
		Saxonburg Ceramics has a wide range of cordierite insulators ranging in OD sizes from 0.140” to 1.00”+ in a variety of shapes (round single and multihole, oval multihole, and custom designs), and lengths from.500” to 36".
	www.saxonburgceramics.com /ceramic-insulators/ceramic-tubes/cordierite.html (88 words)

	Olympus Microscopy Resource Center: Polarized Light Microscopy Gallery - Cordierite Anthophyllite Skarn
		Cordierite is a blue magnesium aluminosilicate mineral that is sometimes utilized as a gemstone.
		Among the other notable characteristics of cordierite is its pronounced pleochroism, or propensity to exhibit different colors when viewed along different axes.
		Among the minerals that are often associated with cordierite is anthophyllite, a member of the amphibole group.
	www.olympusmicro.com /galleries/polarizedlight/pages/cordieriteanthophylliteskarnsmall.html (242 words)

	Lets Talk Gemstones
		Cordierite was known and used as a gemstone in Sri Lanka long before the French geologist-mineralogist Pierre Louis Cordier accurately described it in 1809.
		Cordierite was identified as a specific mineral and named in 1813.
		The ferrous oxide content of cordierite influences its color and causes considerable variation in the specific gravity.
	www.attawaygems.com /NMFG/Lets_talk_gemstones_cordierite.htm (751 words)

	Institut für Mineralogie und Kristallographie - Publikationen
		In both cases, the impact of 4He cores (alpha particles) that were emitted from actinide-bearing mineral inclusions has caused the formation of radiation damage haloes in the host mineral.
		This is indicated by rather moderate broadening of vibrational bands and, in the case of cordierite, apparently undisturbed electron diffraction patterns in the TEM.
		Similar to observations on biotite, alpha particle haloes in chamosite and cordierite as obsd.
	www.univie.ac.at /Mineralogie/cgi-bin/abs.cgi?Searchterm=440&Category=NR (244 words)

	Ceramics and Ceramic Powders
		Nimra offers raw mix for cordierite ceramics with and without binders, you can directly start manufacturing cordierite honeycomb of thin wall thickness or any other product having excellent properties such as low coefficient of thermal expansion, high temperature capabilities and high thermal shock resistance.
		Cordierite raw mix was analyzed for their particle size using CILAS - 920, France by laser diffraction technique.
		Cordierite raw mix was analyzed for major elements and minor elements by wet chemicals, inductively coupled plasma Atomic Emission spectrometer (Jobin, France).
	www.predmaterials.com /ceramics/cordieritePwdr.html (185 words)

	cordierite.htm
		Description: Cordierite is found in many medium-grade metamorphic environments.
		LINCOLN COUNTY: Large porphyroblasts of cordierite are found with euhedral staurolite porphyroblasts and garnet in "greywacke schist" near Merrill such as in the SE Sec.
		MARATHON COUNTY: Found in schist with staurolite and garnet as exposed along the Rib River west of Hamburg in Sec.
	www.uwrf.edu /~wc01/cordierite.htm (247 words)

	Green Car Congress: Corning Introduces New Cordierite Filter for Light-Duty Diesel Vehicles
		This is the second cordierite filter for light-duty diesel applications that Corning has launched.
		Compared to traditional cordierite, Corning’s monolithic DuraTrap AC filters offer low pressure drop to help reduce fuel consumption and increase the power rating.
		Corning is targeting the DuraTrap AC filters to be the first cordierite filters used in large-scale for diesel passenger cars.
	www.greencarcongress.com /2006/04/corning_introdu.html (396 words)

	Olivine, Cordierite and Feldspar
		one of the most diagnostic properties of cordierite is that it is VERY pleochroic
		Cordierite is a RING silicate, similar to beryl
		Cordierite is found in contact and regionally metamorphosed rocks in localities like Burma, Brazil, Sri Lanka, India etc.
	socrates.berkeley.edu /~eps2/wisc/Lect14.html (425 words)

	Definition of cordierite - Merriam-Webster Online Dictionary
		Learn more about "cordierite" and related topics at Britannica.com
		Find more about "cordierite" instantly with Live Search
		See a map of "cordierite" in the Visual Thesaurus
	www.merriam-webster.com /dictionary/cordierite (54 words)

	IOLITE, the gemstone variety of cordierite
		COLOR: Various shades of yellowish gray to blue to a blue violet, deeper along the crystal axis.
		Iolite is a popular and interesting gemstone, and is the gem variety of the mineral cordierite.
		It has a pretty violet blue color that is unlike other gemstones, although it has been compared to a light blue sapphire.
	mineral.galleries.com /minerals/gemstone/iolite/iolite.htm (191 words)

	Cordierite Powder from READE
		cordierite powder, magnesium aluminosilicate, dichroite, iolite, alumino magnesium silicate, cordierite powder, magnesium aluminosilicate, dichroite, iolite, alumino magnesium silicate
		2) There are no known large deposits of natural cordierite.
		cordierite powder, magnesium aluminosilicate, dichroite, iolite, alumino magnesium silicate, cordierite powder, magnesium aluminosilicate, dichroite, iolite, alumino magnesium silicate, cordierite powder, magnesium aluminosilicate, dichroite, iolite, alumino magnesium silicate
	www.reade.com /Products/Minerals_and_Ores/cordienite.html (154 words)

	Wisconsin Ceramic Products - Ceramic Materials - Cordierite, Steatite, Porcelain
		Wisconsin Ceramic Products - Ceramic Materials - Cordierite, Steatite, Porcelain
		Whether your application requires electrical insulation, high temperature, thermal shock resistance; one of our application engineers will help in the design and material selection for your part.
		Wisconsin Ceramic Products, Ceramic Materials - Cordierite, Steatite, Porcelain
	rd.business.com /index.asp?epm=s.1&bdcq=Cordierite&bdcr=1&bdcu=http://www.wiceramic.com/&bdct=20071127154020&bdcp=&partner=2662601&bdcs=nwuuid-2662601-857D094B-C6EE-CC99-3DFB-FB90FB439D70-ym (186 words)

	Cordierite Mineral Data
		Gibbs G V, American Mineralogist, 51 (1966) p.1068-1087, The polymorphism of cordierite I: The crystal structure of low cordierite
		Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g.
		Print or Cut-and-Paste your Cordierite Specimen Label here :
	www.webmineral.com /data/Cordierite.shtml (212 words)

	Cordierite-Sekaninaite Series: Cordierite-Sekaninaite Series mineral information and data.
		There is no specific data on health dangers or toxicity for this mineral, however you should always treat mineral samples as potentially toxic/dangerous and use sensible precautions when handling them.
		Yakubovich, O. V., Massa, V., Pekov, I. V., Gavrilenko, P. & Chukanov, N. (2004): Crystal structure of the Na-, Ca-, Be-cordierite and crystallochemical regularities in the cordierite-sekaninaite series.
		Wright's Rock Shop - excellent mineral specimens since 1970
	www.mindat.org /min-8689.html (115 words)

	Cordierite Mineral Data
		Gibbs G V, American Mineralogist, 51 (1966) p.1068-1087, The polymorphism of cordierite I: The crystal structure of low cordierite
		Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g.
		Print or Cut-and-Paste your Cordierite Specimen Label here :
	webmineral.com /data/Cordierite.shtml (221 words)

	HeiDok - Cordierite and its retrograde breakdown products as monitors of fluid-rock interaction during retrograde path ...
		Mat-type (m-type) pinite encompasses chlorite-muscovite pinite and complex m-type pinite, bearing clay minerals, and is in general considered to represent the alteration of cordierite by an alkli-bearing fluid.
		H2O and CO2 contents of partly pinitised cordierite were determined by in situ FTIR measurements in order to detect late-stage modifications of the cordierite channel compositions, possibly related to pinitisation.
		Der Volatilgehalt aller untersuchten Cordierite sind konsistent mit der Equilibrierung mit einer H2O-untersättigten Schmelze.
	www.ub.uni-heidelberg.de /archiv/3082 (1345 words)

	Cordierite (or water sapphire) \| Gemstone Jewelry & Sterling Silver Jewelry \| Wonderstarter.com
		Gem quality cordierite has the same name (or rather names) as the mineral itself, but was in the past also known as water sapphire, particularly when the color was not very intense.
		One also comes across cordierites with a cabochon cut or minutely engraved, particularly in the case of less transparent specimens with numerous inclusions.
		Many cordierites have a decidedly cold, grayish coloration, whereas tanzanite is a warmer color, always with a hint of violet.
	www.wonderstarter.com /Cordierite.htm (266 words)

	Humidicore.Com
		The rotating Cordierite drum adsorbs the exhaust water vapor and transfers it to the incoming cool, dry inlet stream.
		The unique properties of cordierite allow the construction of a simple, inexpensive and almost indestructible enthalpy wheel.
		The very low thermal expansion rate of Cordierite greatly simplifies the sealing system by minimizing axial growth during operation.
	www.humidicore.com /faq.htm (237 words)

	Cordierite (Site not responding. Last check: )
		Cordierite has a relatively high melting point and remarkable expansion properties and is sold as all sorts of kiln (and other high temperature) hardware, but the melting point is lower than mullite's.
		Natural cordierite is birefringent, meaning it shows different colors depending on the angle the light passes through the crystal.
		That has to be a typo, but nonetheless it does make light of the point that cordierite is, unfortunately for firing purposes, an eutectic composition.
	webpages.charter.net /dawill/tmoranwms/Cer_Cord.html (341 words)

	Structure of Beryl and Cordierite (Site not responding. Last check: )
		In the case of beryl and cordierite, the tetrahedral rings are cross-linked by additional tetrahedra.
		The case for calling beryl a cyclosilicate is a bit stronger than cordierite, since the Be and Si tetrahedra are distinct.
		At high temperatures cordierite is hexagonal, implying that the ordering of Al and Si in the rings must be completely random, but on cooling it distorts to orthorhombic, pseudohexagonal symmetry, probably because the Al settle into an ordered arrangement.
	www.uwgb.edu /dutchs/PETROLGY/Beryl-CordStruc.htm (405 words)

	K.C. Industries - steatite, cordierite & porcelain
		Cordierites have excellent resistance to heat shock, due to their low coefficients of thermal expansion.
		As the name implies Dense Cordierite has a high density although achieving this density increases the thermal-expansion of the body and therefore has a negative effect on its resistance to thermal shock
		Cordierite Refractory or open porosity Cordierite has a low coefficients of thermal expansion and therefore performs better in thermal shock applications
	www.kcindustries.com.au /materials (594 words)

	Associated Ceramics & Technology -Cordierite
		Cordierite is a magnesium aluminum silicate which possesses an extremely low thermal expansion and low thermal conductivity.
		Cordierite is used when thermal shock is a concern in the finished product.
		Available in self-glazing form where higher strength, thermal shock, and dielectric strength is required.
	www.associatedceramics.com /cordierite.htm (86 words)

	Cordierite, Manufacturer Cordierite Ceramics, Cordierite Refractory Tubes, Cordierite Refractory Bobbin Set, Expoeter ...
		Cordierite, Manufacturer Cordierite Ceramics, Cordierite Refractory Tubes, Cordierite Refractory Bobbin Set, Expoeter Cordierite, Cordierite India.
		Sonya Ceramics - Manufacturer and expoerter of Cordierite Tubes, Thermo Couple Heads Industrial Ceramic Components, Cordierite Ceramics.
		Bobbins are made out of Cordierite Refractory material (C-551) and are of excellent heat shock resistant quality and widely accepted in domestic as well as export market.
	www.sonyaceramics.com /CORDIERITE.htm (69 words)

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