Difference between revisions of "Tremolite"
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== Description == | == Description == | ||
| − | A fibrous mineral composed of calcium-magnesium silicate. Tremolite is a variety of [ | + | A fibrous mineral composed of calcium-magnesium silicate. Tremolite is a variety of [[asbestos|asbestos]]. Deposits occur in Switzerland, Canada (Ontario, Quebec), and the U.S. (Maine, Pennsylvania, New York). The transparent to opaque stone varies in color from white to gray to a pale green to a pinkish purple. Tremolite is used as a substitute for asbestos in fire-proof products. It is also used as a filler in paints and ceramics. |
| − | + | [[[SliderGallery rightalign|tremoliteRS.jpg~Raman|Tremoliteitaly1.jpg~Raman|tremoliteRSFTR.jpg~Raman]]] | |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
fibrous talc; calcium magenesium silicate; tremolita (Esp.); tremolite (Port.); Tremolit (Deut.) | fibrous talc; calcium magenesium silicate; tremolita (Esp.); tremolite (Port.); Tremolit (Deut.) | ||
| − | + | == Risks == | |
| − | == | + | * Inhalation of dust is toxic. |
| + | * Carcinogenic. | ||
| + | ==Physical and Chemical Properties== | ||
| − | Monoclinic system with bladed prismatic crystals. Often found in masses. Resistant to acids. Cleavage is perfect in two directions at angles of 56 and 124 degrees. Luster = vitreous to silky. Fracture = uneven. Streak = colorless. | + | * Monoclinic system with bladed prismatic crystals. |
| + | * Often found in masses. | ||
| + | * Resistant to acids. | ||
| + | * Cleavage is perfect in two directions at angles of 56 and 124 degrees. | ||
| + | * Luster = vitreous to silky. | ||
| + | * Fracture = uneven. | ||
| + | * Streak = colorless. | ||
{| class="wikitable" | {| class="wikitable" | ||
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! scope="row"| Density | ! scope="row"| Density | ||
| − | | 2.9-3.3 | + | | 2.9-3.3 g/ml |
| − | |} | + | |} |
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| − | + | ==Resources and Citations== | |
| − | + | * Mineralogy Database: [http://www.webmineral.com/data/Tremolite.shtml Tremolite] | |
* Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993 | * Richard S. Lewis, ''Hawley's Condensed Chemical Dictionary'', Van Nostrand Reinhold, New York, 10th ed., 1993 | ||
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* C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979 | * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979 | ||
| − | * Wikipedia | + | * Wikipedia: http://en.wikipedia.org/wiki/Tremolite (Accessed Sept. 17, 2005) |
* ''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 | ||
Latest revision as of 11:43, 16 June 2022
Description
A fibrous mineral composed of calcium-magnesium silicate. Tremolite is a variety of Asbestos. Deposits occur in Switzerland, Canada (Ontario, Quebec), and the U.S. (Maine, Pennsylvania, New York). The transparent to opaque stone varies in color from white to gray to a pale green to a pinkish purple. Tremolite is used as a substitute for asbestos in fire-proof products. It is also used as a filler in paints and ceramics.
Synonyms and Related Terms
fibrous talc; calcium magenesium silicate; tremolita (Esp.); tremolite (Port.); Tremolit (Deut.)
Risks
- Inhalation of dust is toxic.
- Carcinogenic.
Physical and Chemical Properties
- Monoclinic system with bladed prismatic crystals.
- Often found in masses.
- Resistant to acids.
- Cleavage is perfect in two directions at angles of 56 and 124 degrees.
- Luster = vitreous to silky.
- Fracture = uneven.
- Streak = colorless.
| Composition | Ca2Mg5Si8O22(OH)2 |
|---|---|
| CAS | 77536-68-6 |
| Mohs Hardness | 5 - 6 |
| Density | 2.9-3.3 g/ml |
Resources and Citations
- Mineralogy Database: Tremolite
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979
- Wikipedia: http://en.wikipedia.org/wiki/Tremolite (Accessed Sept. 17, 2005)
- Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998