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Topic: Zinc sulfide

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	Zinc - MSN Encarta
		Pure zinc is a crystalline metal, insoluble in hot and cold water and soluble in alcohol, acids, and alkalies.
		Zinc is unaffected by dry air; in moist air it is oxidized and becomes coated with a carbonate film that protects it from further corrosion.
		Zinc chloride is used as a wood preservative and as a soldering fluid.
	encarta.msn.com /encnet/refpages/RefArticle.aspx?refid=761564552 (467 words)

	Mineral Information Institute - ZINC
		Zinc oxide: in medicine, in paints, as an activator and accelerator in vulcanizing rubber, as an electrostatic and photoconductive agent in photocopying.
		Zinc was used long before it was known to be a distinct element.
		Zinc is relatively non-reactive in air or water.
	www.mii.org /Minerals/photozinc.html (727 words)

	Eco-USA: Zinc
		Zinc is found in the air, soil, and water and is present in all foods.
		Zinc sulfide is gray-white or yellow-white, and zinc oxide is white.
		Zinc compounds, such as zinc acetate, zinc chloride, and zinc sulfate, are used in preserving wood and in manufacturing and dyeing fabrics.
	www.eco-usa.net /toxics/zinc.shtml (1323 words)

	zinc. The Columbia Encyclopedia, Sixth Edition. 2001-05
		The chromate, zinc yellow, serves as a pigment; sodium zincate, as a water softener and as a flocculating agent in water purification.
		Chief sources of zinc are the sulfide ore, zinc blende, or sphalerite (called also blende or “fl Jack”); zincite, an oxide; calamine, a silicate; and smithsonite, the zinc carbonate.
		The sulfide ore is roasted to the oxide, then mixed with coal and heated to 1,200°C. The zinc vaporizes and is condensed outside the reaction chamber and cast into blocks called spelter.
	www.bartleby.com /65/zi/zinc.html (398 words)

	Electrochemistry Encyclopedia --- Extracting metals from sulfide ores
		The interaction of the organic collector with the sulfide mineral surface occurs by a corrosion-type mechanism in which an anodic oxidation reaction attaches the organic collector to the mineral surface and the electrons transferred to the mineral by this reaction are returned to the solution phase by the reduction of oxygen.
		The zinc concentrate is first roasted to release sulfur dioxide and form zinc oxide and then the latter compound is dissolved in sulfuric acid and the metal extracted by electrolysis.
		As with copper, zinc is deposited on the negative electrode and oxygen is evolved, derived from water, at the positive electrode.
	electrochem.cwru.edu /ed/encycl/art-m02-metals.htm (5699 words)

	Scavenging hydrogen sulfide in an oil well - Patent 4252655
		Zinc is preferred as the metallic ion to react with the sulfide because of the particular stability constant range and the compatibility with drilling fluid rheology.
		The zinc ion is particularly effective for reacting with the soluble sulfide or the sulfide ion to prevent stress cracking of steel tubing and tools used in the well and to prevent escape of the hydrogen sulfide which would act as a poison to personnel and environment surrounding the well.
		Hydrogen sulfide reacts readily with the Cu, Pb, and Zn chelates of NTA, precipitating the sulfide ion as insoluble CuS, PbS or ZnS.
	www.freepatentsonline.com /4252655.html (4240 words)

	Zinc - Wikipedia, the free encyclopedia
		Zinc is used in contemporary pipe organ building as a substitute for the classic lead/tin alloy in pipes sounding the lowest (pedal) tones, as it is tonally almost indistinguishable from lead/tin at those pitches, and has the added advantages of being much more economical and lighter in weight.
		Zinc oxide is used as a white pigment in watercolours or paints, and as an activator in the rubber industry.
		Zinc sulfide (sphalerite) minerals are concentrated using the froth flotation method and then usually roasted using pyrometallurgy to oxidise the zinc sulfide to zinc oxide.
	en.wikipedia.org /wiki/Zinc (2604 words)

	zinc
		The principal ores of zinc are sphalerite or blende (sulfide), smithsonite (carbonate), Calamine (silicate), and franklinite (zinc, manganese, iron oxide).
		Zinc can be obtained by roasting its ores to form the oxide and by reduction of the oxide with coal or carbon, with subsequent distillation of the metal.
		Zinc poisoning is mostly accidental from the intake of pesticides, inadvertent therapeutic use of heavy doses of zinc salts, or drinking of acidic juices or brews made in galvanized iron utensils.
	www.speclab.com /elements/zinc.htm (1508 words)

	Zinc sulfide bodies having improved optical transmittance characteristics and mechanical characteristics - Patent ...
		A method for increasing the optical transmission characteristics of zinc sulfide in the visible and infrared portions of electromagnetic spectrum is described.
		With such an arrangement, the optical transmittance of the zinc sulfide body in the visible portion of electromagnetic spectrum is improved without causing an concomitant reduction in the mechanical properties of the zinc sulfide material.
		Zinc Sulfide is approximately 350 microns whereas the grain size of the material as described above using cobalt as a dopant is 2-6 microns which is substantially the same as standard grade Raytran.RTM.
	www.freepatentsonline.com /5324353.html (2093 words)

	ELEMENT: ZINC
		The principal ores of zinc are sphalerite (sulfide), smithsonite (carbonate), calamine (silicate), and franklinite (zine, manganese, iron oxide).
		One method of zinc extraction involves roasting its ores to form the oxide and reducing the oxide with coal or carbon, with subsequent distillation of the metal.
		Zinc is also used extensively to galvanize other metals such as iron to prevent corrosion.
	www.radiochemistry.org /periodictable/elements/30.html (503 words)

	ATSDR - Public Health Statement: Zinc
		Zinc compounds are used by the drug industry as ingredients in some common products, such as vitamin supplements, sun blocks, diaper rash ointments, deodorants, athlete's foot preparations, acne and poison ivy preparations, and antidandruff shampoos.
		Zinc is also a trace mineral nutrient and as such, small amounts of zinc are needed in all animals.
		Average levels of zinc in the air throughout the United States are less than 1 microgram of zinc per cubic meter (µg/m³) of air, but range from 0.1 to 1.7 µg/m³ in areas near cities.
	www.atsdr.cdc.gov /toxprofiles/phs60.html (3032 words)

	Leaching of Zinc Sulfide by Thiobacillus ferrooxidans: Bacterial Oxidation of the Sulfur Product Layer Increases the ...
		Thiobacillus ferrooxidans is the microorganism that is primarily associated with the oxidation of sulfide minerals.
		at the surface of the zinc sulfide and diffusion of ferrous ions
		Kinetics and mechanisms of the non-oxidative dissolution of sphalerite (zinc sulfide).
	aem.asm.org /cgi/content/full/65/12/5285 (4899 words)

	USGS Minerals Information: Zinc
		Zinc is necessary to modern living, and, in tonnage produced, stands fourth among all metals in world production - being exceeded only by iron, aluminum, and copper.
		About three-fourths of zinc used is consumed as metal, mainly as a coating to protect iron and steel from corrosion (galvanized metal), as alloying metal to make bronze and brass, as zinc-based die casting alloy, and as rolled zinc.
		Zinc is also a necessary element for proper growth and development of humans, animals, and plants; it is the second most common trace metal, after iron, naturally found in the human body.
	minerals.er.usgs.gov /minerals/pubs/commodity/zinc (273 words)

	CERAC, inc. CIROM-2 Zinc Sulfide, ZnS (Site not responding. Last check: 2007-10-14)
		Zinc sulfide layers are relatively soft, insoluble in water, but slightly hygroscopic.
		Zinc sulfide films have been used to passivate and AR coat some semiconductors.
		Zinc sulfide is decomposed at the source, and recombination occurs at the substrate if the temperature is near 150°C and proper nucleation is initiated.
	www.cerac.com /pubs/proddata/cirom2.htm (593 words)

	John Straub's lecture notes (Site not responding. Last check: 2007-10-14)
		The reaction of an excess of zinc may lead to formation of zinc oxide, commonly known as "zinc white." Zinc white is a common pigment found in paints.
		During exposure to long wavelength (366 nm) UV light, the zinc sulfide is found to fluoresce and phosphoresce with impressive intensity and vibrant color.
		Crookes observed a glowing image on the zinc sulfide screen consistent with the hypothesis that "rays" had been emitted by the cathode, causing the zinc sulfide to fluoresce.
	people.bu.edu /straub/courses/demomaster/znsglow.html (538 words)

	ATSDR - ToxFAQs™: Zinc
		Zinc has many commercial uses as coatings to prevent rust, in dry cell batteries, and mixed with other metals to make alloys like brass, and bronze.
		Zinc compounds are widely used in industry to make paint, rubber, dyes, wood preservatives, and ointments.
		Tests to measure zinc in hair may provide information on long-term zinc exposure; however, the relationship between levels in your hair and the amount of zinc you were exposed to is not clear.
	www.atsdr.cdc.gov /tfacts60.html (1174 words)

	Luminescence by Bethany G.
		With the zinc sulfide is properly charged before hand the people in the submarine or space shuttle would be able to see the controls and get the power back on.
		Let the zinc sulfide stay in the dark for 3-5 minutes or until the zinc sulfide is not glowing.
		The lights that charged the zinc sulfide caused it to glow brighter or not as bright so there might have been a little difference in that, but it didnât seem to effect the results much.
	share3.esd105.wednet.edu /mcmillend/02SciProj/Bethanyg/BethanyG.htm (2627 words)

	zinc — Infoplease.com
		The emerging roles of zinc in infant nutrition, development, and infectious diseases: Part 2: this part of the series further discusses......
		Zinc for prostate disease and other conditions: a little evidence, a lot of hype, and a significant potential problem.(Complementary......
		Zinc reactivity in zinc-rich coatings co-pigmented with di-iron phosphide.
	www.infoplease.com /ce6/sci/A0853436.html (496 words)

	Leaching of Zinc Sulfide by Thiobacillus ferrooxidans: Experiments with a Controlled Redox Potential Indicate No Direct ...
		sulfide in the absence of the bacteria and analysis of the conversion
		and to sulfidize the mineral surface (11, 24, 41, 44).
		sulfide in the absence of an oxidant (14).
	aem.asm.org /cgi/content/full/64/10/3570 (4201 words)

	Oilfield Glossary: Term 'sulfide'
		Sulfides can be generated from soluble iron sulfide minerals or from sulfate-reducing bacteria.
		The term "active sulfide" is used to denote compounds that revert to H
		S gas when acidified with 2-molar citric-acid solution, as opposed to inert sulfides, which are stable.
	www.glossary.oilfield.slb.com /Display.cfm?Term=sulfide (210 words)

	Autometallographic Silver Enhancement of Zinc Sulfide Crystals Created in Cryostat Sections from Human Brain Biopsies: ...
		Danscher G (1994) Autometallographic (AMG) nerve tracing: demonstration of retrograde axonal transport of zinc selenide in zinc-enriched (ZEN) neurons.
		Frederickson CJ (1989) Neurobiology of zinc and zinc-containing neurons.
		Howell GA, Welch MG, Frederickson CJ (1984) Stimulation-induced uptake and release of zinc in hippocampal slices.
	www.jhc.org /cgi/content/full/45/11/1503 (4176 words)

	Code of Federal Regulations: 21 CFR 73.2995 - Luminescent zinc sulfide (Site not responding. Last check: 2007-10-14)
		Following excitation by daylight or a suitable artificial light, luminescent zinc sulfide produces a yellow-green phosphorescence with a maximum at 530 nanometers.
		Luminescent zinc sulfide shall conform to the following specifications and shall be free from impurities other than those named to the extent that such impurities may be avoided by good manufacturing practice: Zinc sulfide, not less than 99.8 percent.
		The color additive luminescent zinc sulfide may be safely used for coloring externally applied facial makeup preparations and nail polish included under Sec.
	www.cfsan.fda.gov /~lrd/cf732995.html (447 words)

	zinc — FactMonster.com
		Chief sources of zinc are the sulfide ore, zinc blende, or
		Periodic Table of the Elements: Zinc - Periodic Table of the Elements: Zinc 30 Zn Zinc 65.38 2 · 8 · 18 · 2
		Zn - Zn, symbol for the element zinc.
	www.factmonster.com /ce6/sci/A0853436.html (398 words)

	Reactions of Iron with Sulfur, Zinc with Sulfur
		The reaction with zinc produces flame and a near explosion.
		Iron(II) sulfide and zinc sulfide are quite stable compounds and their formation from the metal and sulfur is highly exothermic.
		However, iron and sulfur and zinc and sulfur can be mixed at room temperature and no reaction takes place.
	jchemed.chem.wisc.edu /JCESoft/CCA/CCA3/MAIN/FEZNSUL/PAGE1.HTM (276 words)

	Demonstrations - Zinc + Sulfur
		Zinc is a bluish-white metal used to galvanize iron, and is also found in alloys, batteries, and rubber.
		Zinc and sulfur react with each other violently to produce zinc sulfide; the reaction is accompanied by a vigorous evolution of gas, heat, and light:
		In the first demonstration below, powdered zinc and sulfur are mixed in a porcelain evaporating dish and heated with a flame; the mixture burns with a yellowish-green flame, and leaves a residue of yellow zinc sulfide in the dish.
	www.angelo.edu /faculty/kboudrea/demos/zinc_sulfur/zinc_sulfur.htm (293 words)

	The Mole (Site not responding. Last check: 2007-10-14)
		Because there was no zinc left at the end of the reaction, all 65 g of it must have been chemically consumed.
		If we know that one atom of sulfur combines with one atom of zinc in forming the compound zinc sulfide, we can assume that if 32 g of sulfur react with 65 g of zinc, then an atom of zinc is 65/32 times heavier than an atom of sulfur.
		Because the ratio of zinc to sulfur atoms is 1 to 2, the 32 g that have reacted now represent two sulfur atoms.
	wulfenite.fandm.edu /Sela/Mole/the_mole.htm (7300 words)

	Zinc Sulfide Luminous Products.
		Phosphorescent materials may be used on jewelry, art, novelties, greeting cards, fabrics, and in industrial applications.
		The coatings are available in many different bases such as air drying and oven drying lacquers, heat curing vinyl plastisol for fabrics, water base acrylic for indoor applications, and varnish base for instrument dials etc. This series of products are made with Zinc Sulfide.
		Comes in green and is made with Zinc Sulfide.
	www.blacklite.com /Products/Phosphorescent_Products.htm (183 words)

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