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Topic: Pyrophyllite

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	Untitled Document
		Pyrophyllite is used as a refractory mineral because when it is fired to 1200 C it changes and gets a hardness of 7-8.
		Pyrophyllite areas of growth will be in plastics and paint due to to the low demand in paper and ceramics.
		Pyrophyllite was decomposed at 473C at 3.9Kb, 495C at 3.8Kb and 455C at 3.8Kb.
	www.und.nodak.edu /instruct/mineral/geol318/webpage/wehrle/Articles.html (1030 words)

	PYROPHYLLITE (Aluminum Silicate Hydroxide)
		Pyrophyllite is an early stage metamorphic mineral and is actually quite common although usually not very abundant as good mineral specimens.
		Pyrophyllite is a member of the phyllosilicates, or "leaf" silicates, which have a sheet-like structure.
		Pyrophyllite shares many of the same purposes as talc although it is usually considered inferior to the better grades of talc in all but one use.
	mineral.galleries.com /minerals/silicate/pyrophyl/pyrophyl.htm (736 words)

	PYROPHYLLITE - LoveToKnow Article on PYROPHYLLITE
		Th~ two varieties are thus very similar respectively to talc (q.v.) and it silicate.
		Pale green foliated masses, very like talc in appearance, are found at Beresovsk near Ekaterinburg in the Urals, and at Zerrnatt in Switzerland.
		The most extensive deposits are in the Deep river region of North Carolina, where the compact variety is mined, and in South Carolina and Georgia.
	www.1911encyclopedia.org /P/PY/PYROPHYLLITE.htm (272 words)

	pyrophyllite.htm (Site not responding. Last check: 2007-10-20)
		DODGE COUNTY: Pyrophyllite is a component of the argillites interbedded with quartzite in the Michal Materials Quarry (sec.
		SAUK COUNTY: Pyrophyllite is a fine-grained component of the phyllites and argillites interleaved with the Baraboo Quartzite (Dott and Dalziel, 1970, Brown, 1987).
		- Pyrophyllite is a component of the metasaprolite horizon at the base of the Baraboo Quartzite, occurring both in the ground mass and in veins with kaolin, muscovite and diaspore.
	www.uwrf.edu /~wc01/pyrophyllite.htm (263 words)

	Mineral description : Pyrophyllite (Site not responding. Last check: 2007-10-20)
		Pyrophyllite is used as talc sometimes, but since talc is better and cheaper it's use is limited.
		The main usage of pyrophyllite is as a carrier for insectoides and is used as a filler in these products.
		Andalusite in quartz is often coated by soft yellow pyrophyllite.
	www.geology.neab.net /minerals/pyrophyl.htm (270 words)

	Pyrophyllite: Newfoundland and Labrador Heritage (Site not responding. Last check: 2007-10-20)
		The physical properties of pyrophyllite and talc are practically identical.
		The main difference is that pyrophyllite has an abundance of aluminum in its chemical make-up and talc has an abundance of magnesium.
		Pyrophyllite occurs in metamorphic rocks rich in aluminum.
	www.heritage.nf.ca /environment/pyrophy.html (92 words)

	Pyrophyllite and Talc
		Pyrophyllite and talc are "end-member" 2:1 phyllosilicates because they have no net layer charge.
		Adjacent layers of pyrophyllite (or talc) are instead held together by weaker electrostatic and van der Waals bonding across the narrow interlayer space.
		The weak cohesion between layers also means that pyrophyllite and talc tend to be poorly ordered and may exhibit a variety of polytypes or outright stacking disorder.
	www.msu.edu /course/css/825/snapshot.afs/teppen/Pyro_and_Talc.htm (527 words)

	Mineral Resources - Pyrophyllite & Talc (Site not responding. Last check: 2007-10-20)
		Pyrophyllite is a hydrated aluminium silicate mineral with industrially important properties similar to those of talc.
		Pyrophyllite is used predominantly as a constituent in refractories and whiteware ceramics, and as a mineral filler.
		Small tonnages of pyrophyllite are also produced intermittently by Mudgee Dolomite and Lime Pty Ltd (for contact details see the section on ‘Limestone’) from a deposit at Botobolar near Mudgee.
	minerals.nsw.gov.au /invest/minerals/industrial/pyrophylliteandTalc (120 words)

	Mineral Information Institute - TALC and PYROPHYLLITE (Site not responding. Last check: 2007-10-20)
		Both are very soft: talc is the softest mineral on the Moh’s hardness scale at 1, and pyrophyllite is 1 to 2.
		Chinese “soapstone” carvings are carved from fine-grained pyrophyllite.
		All the pyrophyllite produced in the United States is mined in North Carolina.
	resourcescommittee.house.gov /subcommittees/emr/usgsweb/descriptions/descTalc.html (448 words)

	Code of Federal Regulations: 21 CFR 73.1400 - Pyrophyllite (Site not responding. Last check: 2007-10-20)
		Pyrophyllite may be identified and semiquantitatively determined by its characteristic X-ray powder diffraction pattern and by its optical properties.
		Pyrophyllite may be safely used in amounts consistent with good manufacturing practice to color drugs that are to be externally applied.
		Certification of this color additive is not necessary for the protection of the public health, and therefore batches thereof are exempt from the certification requirements of section 721(c) of the act.
	vm.cfsan.fda.gov /~lrd/cf731400.html (345 words)

	Pyrophyllite
		Pyrophyllite belongs to the montmorillonite group of minerals.
		Pyrophyllite is quite abundant but not particularly common.
		Pyrophyllite is quite soft with a Mohs hardness of 1 to 1.5 and can be scratched with a finger nail
	www.azom.com /details.asp?ArticleID=1457 (257 words)

	7 - Lecture notes for Clay Mineralogy
		- Pyrophyllite ----> Low-grade metamorphism of Al-rich volcanic and sed.
		Relatively pure pyrophyllite is greasy white to gray in color.
		Pyrophyllite's crystal habit is displayed as unique radiating stellated (star-like) aggregates.
	www.gly.uga.edu /schroeder/geol6550/CM07.html (395 words)

	index
		The specimens of pyrophyllite shown in these pictures are taken from the University of North Dakota's collection.
		Pyrophyllite has long been used in slate pencils and tailor chalk.
		Pyrophyllite often occurs in aggregates mixed with other minerals, but when separated they show little deviation from the ideal composition.
	www.und.nodak.edu /instruct/mineral/geol318/webpage/hirst (419 words)

	UFO Area 3-Billion Year Old Manufactured Spheroids? (Site not responding. Last check: 2007-10-20)
		The manufactured metallic spheroids have been mined out of a layer of pyrophyllite rock and geologically and by the various radio-isotope.
		I was intrigued by the form of the spheres, grooves around the middle and the fact that they are as hard as steel, while the material (pyrophyllite) in which they are found, is as soft as limestone with a count of only 3 on the Moh scale.
		As you probably know, pyrophyllite (Al2 Si4 O10 (OH)2) is a secondary mineral and the deposits were formed by a process of sedimentation.
	www.ufoarea.com /aas_ancient_spheroids.html (757 words)

	Glendon
		Pyrite cubes are abundant at this mine, and occur in every size up to 5 inches or more across (although crystals larger than 3 inches are usually broken).
		Pyrophyllite is a white clay mineral, formula Al2Si4O10(OH)2; it is a soft, slippery material much like talc or kaolinite.
		Pyrophyllite is used as an inert filler in many products such as insecticide and rubber.
	www.homestead.com /aikengms/Glendon.html (255 words)

	The South African Spheres
		The pyrophyllite is a mineral created by metamorphism at moderate temperature and burial depths of over several kilometers.
		The pyrite spheres are metamorphic nodules that formed during the alteration of either clay or volcanic ash to pyrophyllite by metamorphism.
		Since the spheres are metamorphic nodules from the pyrophyllite, then they could not have been carved before the sediment was buried and metamorphosed, because the nodule would not have existed at the time that the sediments were deposited.
	www.talkorigins.org /faqs/mom/spheres.html (2503 words)

	Phyllosilicates (Site not responding. Last check: 2007-10-20)
		The structure of pyrophyllite is a stack of silicate-gibbsite-silicate sandwiches.
		Usually they would be viewed as two distinct minerals, but their properties are identical and they are often associated and intergrown.
		This is the first specimen that we have seen from Belgium, a known producer of Pyrophyllite.
	www.wildaboutrocks.com /category24_2.htm (893 words)

	PHOSPHATE MINERALS AT GRAVES MOUNTAIN, GEORGIA
		Rare transparent blue crystals of kyanite are sometimes found in the casts, but most of the kyanite is altered to pyrophyllite and dickite.
		Clear greenish prisms of pyrophyllite are common in the casts, but the pyrophyllite is extremely brittle and usually bridges any open cavities.
		Rare intact crystals are among the finest micros of pyrophyllite known.
	www.gamineral.org /gravesmt-hb.htm (921 words)

	Manuels Pyrophyllite Mine: Newfoundland and Labrador Heritage
		Pyrophyllite has a different chemical composition from talc, but the two minerals have some properties in common, such as softness and a light colour.
		The blasted mineral is sorted visually, and the ore is separated from the waste and taken to the crusher.
		Pyrophyllite forms when hot fluids from deep in the earth come into contact with volcanic rock, which is chemically transformed into pyrophyllite.
	www.heritage.nf.ca /environment/manuels.html (882 words)

	[No title] (Site not responding. Last check: 2007-10-20)
		A new report from market analyst Roskill says that the main areas of growth for talc in the next few years are likely to lie outside its two main end-uses of paper and ceramics.
		The Economics of Talc & Pyrophyllite (9th edition, 2003) says that by far the largest markets for talc worldwide lie in paper and ceramics, each of which accounts for some 30% of total consumption of talc minerals.
		Asia is estimated to account for over 40% of world talc consumption and for over 85% of pyrophyllite consumption.
	doc.tms.org /servlet/ProductCatalog?itemid=ROS-79 (474 words)

	Surface-Induced Nickel Hydroxide Precipitation in the Presence of Citrate and Salicylate -- Yamaguchi et al. 65 (3): ...
		Pyrophyllite and gibbsite were chosen as sorbents because of
		of LS-gibbsite and of pyrophyllite are described elsewhere (Scheidegger et al., 1996).
		The role of Al in the formation of secondary precipitates on pyrophyllite, gibbsite, talc, and amorphous silica: A DRS study.
	soil.scijournals.org /cgi/content/full/65/3/729 (3779 words)

	PYROPHYLLITE - Online Information article about PYROPHYLLITE
		volume, hence the name pyrophyllite, from the See also:
		The compact variety of pyrophyllite is used for See also:
		Pyrophyllite occurs in schistose rocks, often associated with See also:
	encyclopedia.jrank.org /PYR_RAY/PYROPHYLLITE.html (451 words)

	Code of Federal Regulations: 21 CFR 73.2400 - Pyrophyllite (Site not responding. Last check: 2007-10-20)
		The color additive pyrophyllite shall conform in identity and specifications to the requirements of Sec.
		Pyrophyllite may be safely used for coloring externally applied cosmetics, in amounts consistent with good manufacturing practice.
		The labeling of the color additive and any mixtures prepared therefrom intended solely or in part for coloring purposes shall conform to all applicable requirements of law, including the requirements of Sec.
	vm.cfsan.fda.gov /~lrd/cf732400.html (213 words)

	GemRocks: Soapstone
		Some soapstone contains noteworthy percentages of pyrophyllite, which is virtually indistinguishable from talc by macroscopic means.
		Other relatively common constituents of soapstone, which may or may not be macroscopically discernible, are chlorite, dolomite, magnesite, tremolite and minor amounts of oxides such as magnetite and chromite and even rare sulfides.
		Pyrophyllite-rich rocks, many of which are dark gray, slatelike rocks consist largely of pyrophyllite but also contain up to about 10 percent chloritoid or epidote and, in some cases other minerals such as rutile; they have been recovered and used from several localities -- e.g.
	www.cst.cmich.edu /users/dietr1rv/soapstone.htm (864 words)

	Pyrophyllite specimen from Great South Gems and Minerals online catalog (Site not responding. Last check: 2007-10-20)
		A member of the Phyllosilicates family, Pyrophyllite is a Basic Aluminum Silicate.
		Pyrophyllite is used principally in ceramics and as a filler in paints and rubber products.
		Pyrophyllite has a greasy feel to the touch.
	www.greatsouth.net /p-M646.html (54 words)

	What's New
		Pyrophyllite Clay however is a very rare and unique Amorphous Silica Clay.
		Our unique Pyrophyllite Clay was created millions of years ago as a result of geothermal activity near what is known today as
		An analysis of Pyrophyllite Clay reveals its rich silica content — 60% as silicate salts, along with over 75 other trace mineral and rare earths, which may explain the silky smooth skin most people experience after using this clay in a bath or as a clay mask, and the amazing health benefits when taken internally.
	www.bulkherbshop.com /new.html (450 words)

	HIGH SULFIDATION GOLD-COPPER MINERALIZATION AT PEAK HILL, NSW, AUSTRALIA: DEFORMATION OF AN UNUSUAL EPITHERMAL DEPOSIT (Site not responding. Last check: 2007-10-20)
		Alteration facies are zoned with an extensive pyrophyllite core grading out through kaolinite-alunite, to sericite alteration.
		Disseminated gold-copper mineralization is concentrated around the margin of the pyrophyllite core, where gold occurs as inclusions in pyrite.
		This style of deposit is likely to be recessive due to the abundance of pyrophyllite and sericite, suggesting there may be other concealed deposits in deformed and eroded terrains prospective for magmatic-associated Au-Cu mineralization.
	gsa.confex.com /gsa/2002AM/finalprogram/abstract_42286.htm (504 words)

	Standard Mineral Company
		Pyrophyllite ore is mined in several open-pit mines and is crushed, dry-ground and air-classified at the Company’s mill in Robbins.
		The processed pyrophyllite ore is sold under the trade name PYRAX
		Several grades of PYRAX are differentiated by particle size, moisture content, fired color, and purity as measured by fineness and screen residue.
	www.rtvanderbilt.com /standard.htm (229 words)

	USGS Spectral Library Wavelength Precision
		The wavelength precision of our custom-modified, computer-controlled Beckman spectrometer was checked using Holmium Oxide filters in the visible and the positions of known mineral bands in the near infrared.
		In particular, we developed pyrophyllite as a wavelength standard because of its many narrow absorption bands (Clark et al., 1990b).
		We have found that for the samples we have measured, pyrophyllite absorptions in the near-infrared are stable, and located at the following positions.
	speclab.cr.usgs.gov /spectral.wave.precision.html (511 words)

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