Difference between revisions of "Wolframite"
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Mineralogy Database: [http://www.webmineral.com/data/Wolframite.shtml Wolframite] | Mineralogy Database: [http://www.webmineral.com/data/Wolframite.shtml Wolframite] | ||
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* ''Encyclopedia Britannica'', http://www.britannica.com Comment: "wolframite" Encyclopædia Britannica [Accessed December 4, 2001]. : Mohs = 5-5.5 | * ''Encyclopedia Britannica'', http://www.britannica.com Comment: "wolframite" Encyclopædia Britannica [Accessed December 4, 2001]. : Mohs = 5-5.5 | ||
Revision as of 22:10, 1 May 2016
Description
A metallic ore containing both iron tungstate and manganese tungstate. Wolframite occurs as veins in granite rocks. It is found in England (Cornwall), Spain, Portugal, Germany, Myanmar (formerly Burma), the Malay Peninsula, Australia and the U.S. (Colorado, New Mexico, Arizona, North Carolina). Similar tungstate minerals are hübnerite (manganese tungstate) and ferberite (iron tungstate). All three of these ores are used as a source of tungsten.
Synonyms and Related Terms
hübnerite; huebnerite; ferberite; Wolframit (Deut.); wolframita (Port.)
Other Properties
Crystals = prismatic:short, striated, and flattened. Fracture = uneven. Streak = gray or black. Luster = metallic to submetallic. Cleavage = perfect (lengthwise)
| Mohs Hardness | 4.0-4.5 |
|---|---|
| Density | 7.12-7.51 |
Additional Information
Mineralogy Database: Wolframite
Sources Checked for Data in Record
- Encyclopedia Britannica, http://www.britannica.com Comment: "wolframite" Encyclopædia Britannica [Accessed December 4, 2001]. : Mohs = 5-5.5
- C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979 Comment: Mohs 4-4.5
- Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Wolframite (Accessed Sept. 20, 2005) Mohs = 4-4.5