Difference between revisions of "Titanite"
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[[[SliderGallery rightalign|TitaniteRS.jpg~Raman|Titaniteitaly1.jpg~Raman]]] | [[[SliderGallery rightalign|TitaniteRS.jpg~Raman|Titaniteitaly1.jpg~Raman]]] | ||
| − | == | + | == Physical and Chemical Properties == |
| − | Brittle, wedge-shaped monoclinic crystals. Good cleavage in one direction. | + | * Brittle, wedge-shaped monoclinic crystals. |
| − | + | * Good cleavage in one direction. | |
| − | Fracture = conchoidal. Streak = white. Luster = vitreous to adamantine. | + | * Fracture = conchoidal. |
| − | + | * Streak = white. | |
| − | No fluorescence under UV. | + | * Luster = vitreous to adamantine. |
| + | * No fluorescence under UV. | ||
{| class="wikitable" | {| class="wikitable" | ||
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|- | |- | ||
! scope="row"| Density | ! scope="row"| Density | ||
| − | | 3.4-3.6 | + | | 3.4-3.6 g/ml |
|- | |- | ||
! scope="row"| Refractive Index | ! scope="row"| Refractive Index | ||
| 1.885-1.990; 1.915-2.050 | | 1.885-1.990; 1.915-2.050 | ||
|} | |} | ||
| − | |||
| − | |||
| − | |||
| − | |||
== Comparisons == | == Comparisons == | ||
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[[media:download_file_447.pdf|Natural and Simulated Diamonds]] | [[media:download_file_447.pdf|Natural and Simulated Diamonds]] | ||
| + | ==Resources and Citations== | ||
| + | * Mineralogy Database: [http://www.webmineral.com/data/Titanite.shtml Titanite] | ||
| − | + | * ''Encyclopedia Britannica'', http://www.britannica.com Comment: "sphene" [Accessed December 4, 2001] | |
| − | |||
| − | * ''Encyclopedia Britannica'', http://www.britannica.com Comment: "sphene" | ||
* 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/Titanite (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 | ||
Revision as of 12:08, 10 June 2022
Description
Small yellow, gray, green or brown crystals occasionally used as gemstones. Titanite, or sphene, is composed of calcium titanium silicate. It is often associated with Granite. Deposits have been found in Canada (Ontario), Mexico, Austria (Tirol), Italy (Trentino), Norway, Switzerland, Madagascar, and the U. S. (New York, Montana, California).
Synonyms and Related Terms
sphene; Titanit (Deut.); Sphen (Deut.); titanita (Esp.); titanite (Fr.); tytanit (Pol.); titanite, esfena (Port.); titaniet (Ned.)
Physical and Chemical Properties
- Brittle, wedge-shaped monoclinic crystals.
- Good cleavage in one direction.
- Fracture = conchoidal.
- Streak = white.
- Luster = vitreous to adamantine.
- No fluorescence under UV.
| Composition | CaTiSiO5 |
|---|---|
| Mohs Hardness | 5.0 - 5.5 |
| Density | 3.4-3.6 g/ml |
| Refractive Index | 1.885-1.990; 1.915-2.050 |
Comparisons
Natural and Simulated Diamonds
Resources and Citations
- Mineralogy Database: Titanite
- Encyclopedia Britannica, http://www.britannica.com Comment: "sphene" [Accessed December 4, 2001]
- 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/Titanite (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