sphalerite

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sphalerite

sphalerite , mineral composed of zinc sulfide, usually containing some iron and a little cadmium. It occurs in crystals of the isometric system but more generally in cleavable, compact masses. It is transparent to translucent and varies greatly in color, iron-free specimens being pale yellow and those with iron being brown, red, black, or green. The most important source of zinc , sphalerite is a widely distributed mineral that commonly occurs in association with galena. It is found in large deposits in many parts of the world.

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sphalerite

World Encyclopedia | 2005 | Â© World Encyclopedia 2005, originally published by Oxford University Press 2005. (Hide copyright information) Copyright

sphalerite (blende) Sulphide mineral composed of zinc sulphide (ZnS), an important source of zinc. It has cubic system tetrahedral crystals or granular masses. It is white when pure, but more commonly yellow, black, or brown with a resinous lustre. Hardness 3.5–4; r.d. 4.

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Free newspaper and magazine articles

	Sphalerite: Eagle Mine, Gilman, Eagle County, Colorado.(Connoisseur's Choice) Magazine article from: Rocks & Minerals; 9/1/2003
	COLORADO SPHALERITE. Magazine article from: Rocks & Minerals; 7/1/1999
	A 1946 Find of Gem Sphalerite Crystals at the Balmat Zinc Mine, St. Lawrence County, New York. Magazine article from: Rocks & Minerals; 11/1/1998

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	The oxidation behavior of unactivated and mechanically activated sphalerite Magazine article from: Metallurgical and Materials Transactions; 12/1/2002; ; 700+ words ; ...mechanically activated sphalerites were examined and discussed...mechanically activated sphalerite between 400 and 873K...oxidation than unactivated sphalerite. The different oxidation...mechanically activated sphalerites. The state of mechanically...10] So unactivated sphalerite transforms ...
	High-resolution XANES S [L.sub.3,2] edge spectra collected from a series of iron-bearing sphalerite(Zn,Fe)S minerals (1).(X-ray Absorption Near Edge Structure)(Report) Magazine article from: Canadian Journal of Chemistry; 10/1/2007; ; 700+ words ; ...been collected from a series of high-quality sphalerite samples. Each of the sphalerite samples examined has a characteristic iron...edge spectra collected from synthetic ZnS sphalerite. The theoretical and experimental data provide...
	Sphalerite: Eagle Mine, Gilman, Eagle County, Colorado.(Connoisseur's Choice) Magazine article from: Rocks & Minerals; 9/1/2003; ; 700+ words ; ...unusually large number of good sphalerite occurrences, the Eagle mine...correspondingly large number of sphalerite specimens. Inasmuch as the...Mineral Show, two Gilman sphalerites have been chosen for this...FIGURES 1-2 OMITTED] Sphalerite is notable for its dodecahedral...
	COLORADO SPHALERITE. Magazine article from: Rocks & Minerals; 7/1/1999; ; 700+ words ; ...Colorado boasts numerous localities where fine sphalerite specimens have been found. Sphalerite, (Zn,Fe)S, can be one of the more...from numerous localities worldwide. Fine sphalerite specimens, for example, have been found...
	Effect of aging conditions on the leaching of mechanically activated pyrite and sphalerite Magazine article from: Metallurgical and Materials Transactions; 10/1/2003; ; 700+ words ; ...mechanically activated sphalerites aged either in air...content of pyrite and sphalerite mechanically activated...activated pyrite and sphalerite on the leaching behaviors...activated pyrites and sphalerites using X-ray diffraction...activation of pyrite and sphalerite are also discussed...
	A 1946 Find of Gem Sphalerite Crystals at the Balmat Zinc Mine, St. Lawrence County, New York. Magazine article from: Rocks & Minerals; 11/1/1998; ; 700+ words ; ...were found. Here we will describe gem sphalerite crystals more than fifty years after...some of the district's subsequent sphalerite finds that have not been recorded in...5 to 1 meter deep, containing amber sphalerite crystals to 2.5 cm long. Not wanting...
	Galena, sphalerite and associated minerals from the Tri-State district, Kansas, Missouri and Oklahoma.(Brief article) Magazine article from: The Mineralogical Record; 5/1/2008; ; 700+ words ; ...The district became famous for spectacular examples of calcite (in crystals measuring up to 5 feet long), galena and sphalerite. More than 60 different minerals have been found in the district. Cheap foreign sources of lead and zinc coupled with an...
	Examination of the proposition that Cu(II) can be required for charge neutrality in a sulfide lattice--Cu in tetrahedrites and sphalerite (1).(Report) Magazine article from: Canadian Journal of Chemistry; 10/1/2007; ; 700+ words ; ...edge spectra of relatively pure natural sphalerite treated with mildly acidic aqueous cupric...atoms in the outermost layer of the sphalerite and to O atoms in chemisorbed water...and O at the surface of the treated sphalerite. Key words: tetrahedrite, sphalerite...
	Effect of microwave treatment on the flotation and magnetic separation properties of pyrite, chalcopyrite, galena and sphalerite Magazine article from: Minerals & Metallurgical Processing; 8/1/2007; ; 700+ words ; ...pyrite, chalcopyrite, galena and sphalerite, were studied. Pure mineral samples...700 to 900C, while the temperature of sphalerite reached only ~130C. The floatability...was no change in the floatability of sphalerite. The magnetic properties of pyrite...
	Mineralogical Changes Occurring during the Fluid-Bed Roasting of Zinc Sulfide Concentrates Magazine article from: JOM; 12/1/2004; ; 700+ words ; ...sulfide concentrates, the sulfur in the sphalerite (Zn, Fe)S diffuses out of the particles...In this process, the sulfur in the sphalerite (Zn,Fe)S is converted to sulfur...sulfuric acid. Much of the zinc in the sphalerite is converted to ZnO, but a significant...