
	Where results make sense

Topic: Realgar

Related Topics

Sapphirine

List of minerals

Ruby

Gemstone

Chevrolet

Post Office Protocol

Platypus

Geography of the United States

Persecution of Christians

In the News (Sun 15 Nov 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Realgar - Wikipedia, the free encyclopedia
		Realgar is soft with a Mohs hardness of 1.5 to 2 and has a specific gravity of 3.5.
		Realgar, orpiment, and arsenopyrite provide nearly all the world's supply of arsenic as a byproduct of smelting concentrates derived from these ores.
		Realgar is also used by firework manufacturers to create the color white in fireworks, manufacturing shot, printing and dyeing calico, and depilating and tanning hides.
	en.wikipedia.org /wiki/Realgar (259 words)

	REALGAR - LoveToKnow Article on REALGAR
		The name realgar is of Arabic origin, and was used /.
		It is deposited by the solfataras near Naples and by the hot springs of the Yellowstone National Park.
		Realgar has been used as a pigment and in pyrotechny for producing a brilliant white fire; but it is now replaced by the artificially prepared compound.
	www.1911encyclopedia.org /R/RE/REALGAR.htm (278 words)

	Realgar light sensitivity
		The alteration of realgar to pararealgar is dependent on the wavelength of the light to which the realgar is exposed, as determined from a number of experiments employing various types of filters.
		This behavior is attributed to the absorption and transmission characteristics of realgar.
		Realgar is most properly represented by the formula As This is a cage structure (sometimes referred to as a cradle structure) in which As atoms form a tetrahedron (also referred to as a bisphenoid) and a square of S atoms.
	www.minsocam.org /MSA/collectors_corner/arc/realgar.htm (5714 words)

	Natural Mineral Pigments: Realgar
		Realgar is red arsenic sulfide, usually described as orange red to orange yellow.
		Excellent specimens of realgar were discovered in cavities of dolomite in Binnentale, Switzerland, and in calcite voids in Mercur, Utah, U.S. We obtain realgar from deposits in the Hunan province of China where it is found in large druses (cavities in a mineral filled with protruding crystals) of beautifully formed crystals.
		Realgar is synthesized by heating orpiment to a temperature over 150°C or by sublimation of arsenic and sulfur.
	www.iconofile.com /pigments_realgar.asp (550 words)

	Acupuncturetoday.com \| tell me about Realgar (Site not responding. Last check: 2007-10-25)
		Realgar is not an herb, but a mineral, comprised primarily of arsenic and sulphur.
		Realgar has acrid, bitter, warm, and toxic characteristics, according to the principles of traditional Chinese medicine, and is affiliated with the Heart, Liver and Stomach meridians.
		Realgar is also available in pill, capsule and tablet form, and is sometimes incorporated with other substances into a larger formula.
	www.acupuncturetoday.com /herbcentral/realgar.html (427 words)

	REALGAR (Arsenic Sulfide)
		The arsenic atoms affect the structure altering it from sulfur's orthorhombic symmetry to realgar's monoclinic symmetry.
		Realgar occurs in hydrothermal veins with valuable metal sulfide ores and its bright red color can be an aid to prospectors.
		Other Characteristics: Realgar is unstable in light; specimens should be stored in complete darkness, rarely some specimens fluoresce under UV light and crystals are pleochroic between dark red and orange red.
	mineral.galleries.com /minerals/sulfides/realgar/realgar.htm (453 words)

	IIC: Searchable index of publications
		A variety of realgar paints were prepared using gum arabic as a binder and the hue was seen to vary with the extent of grinding.
		Realgar was found to dissolve in hot Meltmount and, on cooling, crystallized as β-realgar.
		Realgar and its alteration products have been found on a wide range of papyri in the British Museum.
	www.iiconservation.org /publications/digipubs.php?pub_id=120 (183 words)

	Results in (Site not responding. Last check: 2007-10-25)
		When occurring in good specimens, realgar is relatively easy to recognize because of its bright red to orange-yellow color coupled with a resinous to greasy luster.
		Realgar is monoclinic (2/m) and occurs in variably striated prismatic crystals that are reported to reach lengths of 12 cm.
		Realgar is most frequently encountered in epithermal (near-surface, low-temperature) hydrothermal settings such as shallow veins, hot springs, and fumaroles.
	www.findarticles.com /p/articles/mi_m0GDX/is_2_80/ai_n13251394 (440 words)

	Realgar (Site not responding. Last check: 2007-10-25)
		However it gradually changes to yellow when exposed to light as it changes to arsenolite and orpiment.(both having the formula As To retain a bright red colour the mineral must be kept in the dark.
		Realgar is found in low-temperature thermal veins, usually in association with other arsenic (As) or antimony (Sb) minerals.
		Realgar and orpiment were originally used as pigments but this practice was stopped because they are poisonous.
	www.kgg.org.uk /realgarh.html (87 words)

	MFA - CAMEO - Material Description
		Realgar occurs naturally in the Czech Republic, Romania, Macedonia, Japan, and the United States (Utah, Nevada, Wyoming, California) in ore veins that also contain orpiment.
		Realgar, along with orpiment, was used in many early civilizations, such as Egyptian, Syrian, Persian, Indian, and Chinese.
		However, realgar is not considered permanent because it reacts with copper as well as some lead pigments.
	www.mfa.org /_CAMEO/FRONTEND/material_description.asp?name=realgar&language=1 (247 words)

	[No title] (Site not responding. Last check: 2007-10-25)
		Gold that remained in the fluid and was not depleted during formation of AsÐrich pyrite also precipitated in the realgar- and orpiment-bearing and stibnite-bearing siliceous oreshoots and was accompanied by the replacement of calcite by quartz.
		Realgar and orpiment precipitated at the lower temperatures, and eventually stibnite precipitated due to decrease in sulfur activity and temperature.
		Leaching reactions were not important during development of the realgar- and orpiment-bearing and stibnite-bearing siliceous oreshoots and the mineralizing process was not chemically aggressive.
	geopubs.wr.usgs.gov /open-file/of98-620/98-620.txt (7670 words)

	OXIDATION KINETICS OF ARSENIC-SULFIDE MINERALS (Site not responding. Last check: 2007-10-25)
		The occurrence of orpiment and realgar is becoming increasingly observed in a variety of environments.
		Realgar has been observed in abundance in sediment-hosted gold deposits.
		We have studied As2S3(am), orpiment, AsS(am), and realgar to determine the dependence of the oxidation rates of these arsenic-sulfide solids on dissolved oxygen, pH, and temperature.
	gsa.confex.com /gsa/2004AM/finalprogram/abstract_79261.htm (361 words)

	Realgar - TheBestLinks.com - Arsenic, Mineral, Smelting, TheBestLinks.com:Find or fix a stub, ... (Site not responding. Last check: 2007-10-25)
		Realgar - TheBestLinks.com - Arsenic, Mineral, Smelting, TheBestLinks.com:Find or fix a stub,...
		Realgar, Arsenic, Mineral, Smelting, TheBestLinks.com:Find or fix a stub...
		Realgar, orpiment, and pyrite provide nearly all the world's supply of arsenic as a byproduct of smelting concentrates derived from these ores.
	www.thebestlinks.com /Realgar.html (96 words)

	Realgar (Site not responding. Last check: 2007-10-25)
		BREAKABILITY Realgar has a good cleavage in one direction, conchoidal fracture and is brittle.
		OCCURRENCE Realgar is found in low temperature hydrothermal veins with antimony sulfides.
		NOTE 2: Realgar, upon long exposure to light, disintegrates to a light powder composed of arsenolite (an oxide) and orpiment.
	www.gc.maricopa.edu /earthsci/imagearchive/realgar.htm (145 words)

	Rocks & Minerals: Orpiment on LookSmart Junior High
		In recent years, this occurrence has been greatly eclipsed by the unusually fine realgar and orpiment specimens from Chinese and Peruvian occurrences--that is until recently, when extraordinary orpiment specimens were encountered at the Twin Creeks gold mine in Humboldt County, Nevada.
		Cannon (1975) describes minor orpiment as accompanying realgar at its major occurrences in Washington, including the well-known locality in Green River Gorge north of Franklin, King County; the Alverson mine, Skagit County; and the American Arsenic and Bonanza Queen mines, Snohomish County.
		Minor orpiment is reported from Kern (associated with stibnite and realgar in the economic borax deposits), Lake, Siskiyou, Sonoma, and Trinity Counties, California.
	www.gradewinner.com /p/articles/mi_m0GDX/is_2_75/ai_60498490 (642 words)

	AC 2/98: Raman Microscopy Of A 13th-Century Illuminated Text
		When the artist required an orange-red color, which could have been obtained by applying unaltered realgar, the pigment used was identified by Raman microscopy to be either plain vermilion or vermilion mixed with orpiment, as seen on the angel's cloak in Figure 1.
		It is unlikely that, had natural realgar been applied to all 32 illuminations, each page would have been subjected to identical light conditions, and thus a similar degree of transformation to pararealgar for each illumination would not have occured.
		Orpiment, realgar, and pararealgar apparently do not react with lead white, even though the pigments are adjacent to one another on many areas of the manuscript.
	pubs.acs.org /hotartcl/ac/98/feb/raman.html (3280 words)

	RealgarGallery
		Realgar -Shaft 5, Level 280, Baia Sprie, Romania.2" x 1 1/4".
		Realgar with Stibnite - Shaft 5, Level 280, Baia Sprie, Romania.2" x 1 1/2".
		Realgar with Stibnite - Shaft 5, Level 280, Baia Sprie, Romania.
	www.wrightsrockshop.com /gallery/realgar/realgar_gallery2.htm (418 words)

	Nature's Art: Minerals & Crystals
		Realgar, an orange-red arsenic sulfide, is often mistaken for Cinnabar.
		Realgar is very unstable and turns into an orange dust when exposed to light.
		Realgar is found with orpiment near hot springs and low temperature hydrothermal veins.
	www.enaturesart.com /minerals.htm (441 words)

	Results in (Site not responding. Last check: 2007-10-25)
		The mistake is understandable when one considers the larger problem, which is that once an error is in print, it is difficult to dispel.
		The third edition of Dana's System of Mineralogy (1855) is the first reference I can find to realgar's "altering on exposure to light to a mixture of orpiment and arsenolite." Although this is generally not true, the error has continued to be passed on to each successive edition, including the current eighth edition.
		What actually appears to happen is that realgar, on exposure to light, undergoes some sort of crystal lattice breakdown and becomes the dimorph, pararealgar.
	www.findarticles.com /p/articles/mi_m0GDX/is_5_75/ai_65277658 (380 words)

	Realgar Mineral Data
		Comments: Sharp, dark red crystals of realgar to 2 cm on calcite.
		Comments: Black grain of vrbaite in red realgar matrix.
		Gray white with abundant yellow to red internal reflections.
	webmineral.com /data/Realgar.shtml (248 words)

	Mineral description : Realgar (Site not responding. Last check: 2007-10-25)
		Realgar should be stored air tight and in a dark place.
		Realgar shows some pleochroism between orange red to dark red.
		If you have some questions, suggestions or comments you are welcome to write me a line or two.
	www.geology.neab.net /minerals/realgar.htm (103 words)

	[No title] (Site not responding. Last check: 2007-10-25)
		It has been proved that the toxicity of Realgar lies mainly in the contents of soluble arsenicals, which might be produced during the production, processing and storage of the drug..
		In this study, the influence of four different herbs, which were recorded to possess antagonistic effects with Realgar in ancient medical literature on the level of arsenic trioxide(As}{\plain \cf1\f1 q}{\plain \f1 O}{\plain \cf1\f1 q}{\plain \f1) were investigated by hydride generation-atomic fluorescent technique.
		Meanwhile, the contents of As}{\plain \cf1\f1 z}{\plain \f1 S}{\plain \cf1\f1 q }{\plain \f1 in Realgar were found to be increased slightly.
	www.physics.harvard.edu /~wilson/arsenic/conferences/Unidentified_conference/Wednesday/Abstract11.doc (162 words)

	The Corundum Conundrum: A Mineralogical Murder Mystery
		Realgar agreed, "Considering all the work we do for his silly company, it's the least he can do.
		Upon entering the room, Realgar noticed the specimen and assumed that her uncle was explaining that it was what the stone in Keith's ring looked like before it was cut.
		It probably wouldn't matter since Orpiment confessed and Realgar and Hernandez were singing like birds to avoid getting sucked further into the mess.
	fgms.home.att.net /mmmcc.htm (2361 words)

	Realgar (Site not responding. Last check: 2007-10-25)
		GENESIS : it is generally of hydrotermal nature of low temperature and pneumatolitic, usual associated to other arsenic minerals.
		It was a lot used like color is in the European culture and in Asian, unfortunately today many of the paintings realized in the antiquity have changed tonality because of the fact that the realgar alters exposed to sunlight.
		The realgar, like orpiment (prepared also synthetically), it is uses as depilatory in tannery of animal skins and for the artifice fire production; from this mineral it is extracted arsenic (it is composed by approximately 70%), used as insecticide, funghicida, in the industry of the lumber, in odontoiatria and the pharmacopoeia
	www.minerali.it /minerali2/r/realgarenglish.htm (197 words)

	realgar (Site not responding. Last check: 2007-10-25)
		It is also my biggest boner -- I later discovered that people look down on realgar because it cannot be continually displayed in the light.
		Prolonged exposure to the ultraviolet in normal light will cause realgar to degrade into unattractive pararealgar.
		WARNING: Realgar is an arsenic mineral, so you MAY NOT KEEP IT AROUND SMALL CHILDREN.
	www.feraloldguy.com /realgar.htm (212 words)

	! Realgar Collecting fossils minerals rocks shop Gems jewelry lapidary gemstones
		Realgar gets its name from the Arabic words for “powder of the mine” because it is formed from volcanic vapors and is very unstable, meaning it eventually becomes a powder.
		Specimens should be stored in dark areas and only exposed to light for brief periods of time in order to preserve them as long as possible.
		In the past realgar was a common pigment for red paints and dyes.
	www.worldofrockhounds.com /realgar.html (158 words)

	Realgar - technical information
		Realgar is colored because of a reason that Michael and Juraj have not yet determined.
		Realgar is very toxic (MSDS at Fisher Scientific)
		Wallert, A. Orpiment und Realgar, Maltechnik-Restauro, 90, 1984, p.
	webexhibits.org /pigments/indiv/technical/realgar.html (105 words)

	Re: Realgar and Calcite cleaning by Don Peck on 9/24/2004 (Site not responding. Last check: 2007-10-25)
		Posted in response to Realgar and Calcite cleaning from rory howell on September 23, 2004 at 14:20:13:
		Realgar is soluble in HNO3, but not in HCl.
		So, I believe you could etch the calcite with 10% HCl, leaving the realgar unaffected.
	www.rockhounds.com /rocknet/archive/messages/34184.shtml (81 words)

	Realgar: Realgar mineral data from mindat.org mineralogy database
		Realgar: Realgar mineral data from mindat.org mineralogy database
		Realgar mine, Shimen (Chujiang), Changde Prefecture, Hunan, Central South Region, China
		Kyono, A., Kimata, M. & Hatta, T. (2005): Light-induced degradation dynamics in realgar: In situ structural investigation using single-crystal X-ray diffraction study and X-ray photoelectron spectroscopy.
	www.mindat.org /min-3375.html (154 words)

Try your search on: Qwika (all wikis)