Classification of Ammonioalunite |
| IMA status: | Approved |
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| Strunz 8th edition ID: | 6/B.11-30
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| Nickel-Strunz 10th (pending) edition ID: | 7.BC.10
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates) B : Sulfates (selenates, etc.) with additional anions, without H2O C : With medium-sized and large cations |
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| Dana 8th edition ID: | 30.2.4.6
30 : ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN 2 : (AB)2(XO4)Zq |
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| Hey's CIM Ref.: | 25.1.10
25 : Sulphates 1 : Sulphates of the alkali metals and ammonium |
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| mindat.org URL: | http://www.mindat.org/min-203.html Please feel free to link to this page. |
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Type Occurrence of Ammonioalunite |
| Type Locality: | The Geysers, Sonoma Co., California, USA |
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| Year of Discovery: | 1988 |
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Physical Properties of Ammonioalunite |
| Hardness (Mohs): | 2 - 3 |
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Crystallography of Ammonioalunite |
| Crystal System: | Trigonal |
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| Cell Parameters: | a = 7.01Å, c = 17.88Å
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| Ratio: | a:c = 1 : 2.551 |
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| Unit Cell Volume: | V 760.91 ų (Calculated from Unit Cell) |
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Optical Data of Ammonioalunite |
| Type: | Uniaxial (+) |
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| RI values: | nω = 1.590 nε = 1.602 |
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| Maximum Birefringence: | δ = 0.012
 Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. |
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| Surface Relief: | Moderate |
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Chemical Properties of Ammonioalunite |
| Formula: | |
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| Essential elements: | Al, H, N, O, S |
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| All elements listed in formula: | Al, H, N, O, S |
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Relationship of Ammonioalunite to other Species |
| Related Minerals - Nickel-Strunz Grouping): | |
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| Related Minerals - Hey's Index Grouping: | |
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Other Names for Ammonioalunite |
| 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 Ammonioalunite |
| Reference List: | Altaner, S. P., Fitzpatrick, J. J., Krohn, M. D., Bethke, P. M., Hayba, D. O., Goss, J. A. and Brown, Z. A. (1988): Ammonium in alunites. American Mineralogist: 73: 145-152. |
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Internet Links for Ammonioalunite |
| Search Engines: |
Look for Ammonioalunite on Google
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| External Links: | Look for Ammonioalunite on WebmineralLook for Ammonioalunite on Athena MineralogyLook for Ammonioalunite on WikipediaLook for Ammonioalunite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Ammonioalunite in the Natural History Museum (London) online catalogueAmmonioalunite details from Handbook of Mineralogy (PDF) |
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| Mineral Dealers: | Buy Minerals and Crystals from Crystalarium.comBuy Fine Minerals from mineralsweb.comFabre Minerals - search for Ammonioalunite specimensrare and unusual minerals mainly crystallizedSearch for Ammonioalunite on minvision.come-Rocks - Mineral Auctions and SalesThe Arkenstone - Fine MineralsLapis Mineral MagazinBuy fine minerals and gemstones from Pala InternationalWilensky Fine MineralsRare and Unusual minerals at Mineralogical Research CompanyFine Minerals from Dan Weinrich Minerals |
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Localities for Ammonioalunite |
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