Difference between revisions of "Spodumene"
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== Description == | == Description == | ||
| − | A transparent to translucent colored [http://cameo.mfa.org/materials/fullrecord.asp?name=gemstone gemstone]. Spodumene is composed of lithium aluminum silicate. It can occur as a colorless, gray, green (hiddenite), yellow, pink (kunzite), lavender, or gray crystals. Spudomenes are only found in granite pegmatites. They are mined in Sweden, Ireland, the Malagasy Republic, Brazil, Mexico, Canada, and the U.S. (South Dakota, California, North Carolina). Spudomene is used industrially as a source of [http://cameo.mfa.org/materials/fullrecord.asp?name=lithium lithium]. It is also used in the manufacture of [http://cameo.mfa.org/materials/fullrecord.asp?name=ceramic ceramics], [http://cameo.mfa.org/materials/fullrecord.asp?name=enamel | + | A transparent to translucent colored [http://cameo.mfa.org/materials/fullrecord.asp?name=gemstone gemstone]. Spodumene is composed of lithium aluminum silicate. It can occur as a colorless, gray, green (hiddenite), yellow, pink (kunzite), lavender, or gray crystals. Spudomenes are only found in granite pegmatites. They are mined in Sweden, Ireland, the Malagasy Republic, Brazil, Mexico, Canada, and the U.S. (South Dakota, California, North Carolina). Spudomene is used industrially as a source of [http://cameo.mfa.org/materials/fullrecord.asp?name=lithium lithium]. It is also used in the manufacture of [http://cameo.mfa.org/materials/fullrecord.asp?name=ceramic ceramics], [http://cameo.mfa.org/materials/fullrecord.asp?name=enamel%20%28inorganic%29 enamel], and [http://cameo.mfa.org/materials/fullrecord.asp?name=glass glass]. It undergoes an irreversible expansion from its alpha to beta form at 900C. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
| − | hiddenite (green); kunzite (pink to lavender); triphane; | + | hiddenite (green); kunzite (pink to lavender); triphane; Kunzit, Spodumen (Deut.); espodúmeno (Esp.); spodumen (Pol.); espodumena (Port.); spodumen (Ned.) |
== Other Properties == | == Other Properties == | ||
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== Authority == | == Authority == | ||
| − | * | + | * Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993 |
| − | * | + | * Robert Fournier, ''Illustrated Dictionary of Practical Pottery'', Chilton Book Company, Radnor, PA, 1992 |
| − | * ''Encyclopedia Britannica'', http://www.britannica.com Comment: "spodumene" | + | * ''Encyclopedia Britannica'', http://www.britannica.com Comment: "spodumene" Encyclopædia Britannica [Accessed December 4, 2001]. (tech info) |
| − | * | + | * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979 |
* Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Spodumene (Accessed Sept. 17, 2005) | * Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Spodumene (Accessed Sept. 17, 2005) | ||
| Line 47: | Line 47: | ||
* ''Van Nostrand's Scientific Encyclopedia'', Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976 | * ''Van Nostrand's Scientific Encyclopedia'', Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976 | ||
| − | * | + | * Random House, ''Webster's Encyclopedic Unabridged Dictionary of the English Language'', Grammercy Book, New York, 1997 |
* ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998 | * ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998 | ||
Revision as of 06:42, 24 July 2013
Description
A transparent to translucent colored gemstone. Spodumene is composed of lithium aluminum silicate. It can occur as a colorless, gray, green (hiddenite), yellow, pink (kunzite), lavender, or gray crystals. Spudomenes are only found in granite pegmatites. They are mined in Sweden, Ireland, the Malagasy Republic, Brazil, Mexico, Canada, and the U.S. (South Dakota, California, North Carolina). Spudomene is used industrially as a source of lithium. It is also used in the manufacture of ceramics, enamel, and glass. It undergoes an irreversible expansion from its alpha to beta form at 900C.
Synonyms and Related Terms
hiddenite (green); kunzite (pink to lavender); triphane; Kunzit, Spodumen (Deut.); espodúmeno (Esp.); spodumen (Pol.); espodumena (Port.); spodumen (Ned.)
Other Properties
Monoclinic system with flat, prismatic, striated crystals. Cleavage is good in one direction (87 degrees)
Fracture = uneven and splintery. Luster = vitreous to pearly. Streak = white.
| Composition | LiAlSi2O6 |
|---|---|
| Mohs Hardness | 6.5 - 7.0 |
| Density | 3.13 - 3.20 |
| Refractive Index | 1.648 - 1.679 |
Additional Information
Mineralogy Database: Spodumene
Authority
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Robert Fournier, Illustrated Dictionary of Practical Pottery, Chilton Book Company, Radnor, PA, 1992
- Encyclopedia Britannica, http://www.britannica.com Comment: "spodumene" Encyclopædia Britannica [Accessed December 4, 2001]. (tech info)
- C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979
- Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Spodumene (Accessed Sept. 17, 2005)
- Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
- Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998