Classification of Tounkite |
| IMA status: | Approved 1990 |
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| Strunz 8th edition ID: | 8/J.09-55
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| Nickel-Strunz 10th (pending) edition ID: | 9.FB.05
9 : SILICATES (Germanates) F : Tektosilicates without zeolitic H2O B : Tektosilicates with additional anions |
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| Dana 8th edition ID: | 76.2.5.14
76 : TECTOSILICATES Al-Si Framework 2 : Al-Si Framework Feldspathoids and related species |
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| mindat.org URL: | http://www.mindat.org/min-4002.html Please feel free to link to this page. |
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Type Occurrence of Tounkite |
| Co-type Localities: | Tultui lazurite deposit, Malaya Bystraya River, Tunka Valley, Sludyanka (Slyudyanka), Baikal area, Buriatia (Buryatia) Republic, Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia Malo-Bystrinskoye lazurite deposit, Tunka Valley, Sludyanka (Slyudyanka), Baikal area, Buriatia (Buryatia) Republic, Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia |
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| Year of Discovery: | 1992 |
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Physical Properties of Tounkite |
| Lustre: | Vitreous |
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| Colour: | Green to yellowish-green, glass-green with a yellowish or gray tint |
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| Streak: | White |
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| Hardness (Mohs): | 5 - 5½ |
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| Cleavage: | Distinct/Good |
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Crystallography of Tounkite |
| Crystal System: | Hexagonal |
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| Cell Parameters: | a = 12.84Å, c = 32.23Å
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| Ratio: | a:c = 1 : 2.51 |
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| Unit Cell Volume: | V 4,601.73 ų (Calculated from Unit Cell) |
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Optical Data of Tounkite |
| Type: | Uniaxial (+) |
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| RI values: | nω = 1.528 nε = 1.543 |
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| Maximum Birefringence: | δ = 0.015
 Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. |
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| Surface Relief: | Low |
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Chemical Properties of Tounkite |
| Formula: | | (Na,Ca,K) | | [Cl|(SO | | ) | | |Al | | Si | | O | | ] · H | | O |
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| Essential elements: | Al, Cl, H, Na, O, S, Si |
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| All elements listed in formula: | Al, Ca, Cl, H, K, Na, O, S, Si |
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Relationship of Tounkite to other Species |
| Related to: | Cancrinite Group |
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| Related Minerals - Nickel-Strunz Grouping): | | 9.FB.05 | Afghanite | | (Na,Ca,K) | | [(Cl | | ,SO | | ,CO | | ) | | |Al | | Si | | O | | ] · 0.5H | | O |
| | 9.FB.05 | Bystrite | | | 9.FB.05 | Cancrinite | | | 9.FB.05 | Cancrisilite | | | 9.FB.05 | Davyne | | | 9.FB.05 | Franzinite | | (Na,K) | | Ca | | [(SO | | ) | | |Al | | Si | | O | | ] · 0.5H | | O |
| | 9.FB.05 | Giuseppettite | | | 9.FB.05 | Hydroxycancrinite | | | 9.FB.05 | Liottite | | (Na,K) | | Ca | | [Cl | | |(SO | | ) | | |(Al | | Si | | O | | ) | | ] |
| | 9.FB.05 | Microsommite | | | 9.FB.05 | Pitiglianoite | | | 9.FB.05 | Quadridavyne | | | 9.FB.05 | Sacrofanite | | (Na,Ca,K) | | [{(OH) | | ,SO | | ,CO | | ,Cl | | } | | |Al | | Si | | O | | ] · 0.5H | | O |
| | 9.FB.05 | Vishnevite | | (Na,K) | | [(SO | | ,CO | | )|Al | | Si | | O | | ] · 2H | | O |
| | 9.FB.05 | Marinellite | | (Na,K) | | Ca | | [Cl | | |(SO | | ) | | |(Al | | Si | | O | | ) | | ] · 3 H | | O |
| | 9.FB.05 | Farneseite | | (Na,Ca,K) | | [(SO | | ) | | |Al | | Si | | O | | ] · 6H | | O |
| | 9.FB.05 | Alloriite | | (Na,Ca,K) | | Ca | | [Cl | | |(SO | | ) | | |(Al | | Si | | O | | ) | | ] |
| | 9.FB.05 | IMA2008-006 | | | 9.FB.10 | Bicchulite | | | 9.FB.10 | Danalite | | | 9.FB.10 | Genthelvite | | | 9.FB.10 | Haüyne | | (Na,Ca) | | [Al | | Si | | (O,S) | | ](SO | | ,Cl) | | |
| | 9.FB.10 | Helvite | | | 9.FB.10 | Kamaishilite | | | 9.FB.10 | Lazurite | | | 9.FB.10 | Nosean | | | 9.FB.10 | Sodalite | | | 9.FB.10 | Tsaregorodtsevite | | | 9.FB.10 | Tugtupite | | | 9.FB.10 | Helvine | | | 9.FB.15 | Marialite | | | 9.FB.15 | Meionite | | | 9.FB.15 | Silvialite | |
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Other Names for Tounkite |
| Synonyms: | |
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| German names: | |
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| Spanish names: | |
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Other Information |
| Health Warning: | No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care. |
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References for Tounkite |
| Reference List: | Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1992): 121(2): 92-95.
American Mineralogist (1994): 79: 187.
New Minerals (1997), New Minerals 1990-1994.
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Internet Links for Tounkite |
| Search Engines: |
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| External Links: | Look for Tounkite on WebmineralLook for Tounkite on Athena MineralogyLook for Tounkite on WikipediaLook for Tounkite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Tounkite in the Natural History Museum (London) online catalogueTounkite details from Handbook of Mineralogy (PDF) |
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| Mineral Dealers: | Wendel Minerals - Auktion & ShopSearch for Tounkite at Thames Valley MineralsRare and Unusual minerals at Mineralogical Research Companyrare and unusual minerals mainly crystallizedThe Arkenstone - Fine MineralsMineral Classics - Worldwide Collector Quality Minerals and GemsWright's Rock Shop - excellent mineral specimens since 1970Top quality minerals from Kristalle of CaliforniaBuy Fine Minerals from mineralsweb.comFind Tounkite on www.crystalclassics.co.ukLapis Mineral MagazinBuy fine minerals and gemstones from Pala International |
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| Jobs: | Mining & Geology Jobs |
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Localities for Tounkite |