Classification of Leogangite |
| IMA status: | Approved 1998 |
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| Strunz 8th edition ID: | 7/D.54-40
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| Nickel-Strunz 10th (pending) edition ID: | 8.CC.15
8 : PHOSPHATES, ARSENATES, VANADATES C : Phosphates without additional anions, with H2O C : With only medium-sized cations, RO4:H2O = 1:1.5 |
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| mindat.org URL: | http://www.mindat.org/min-26518.html Please feel free to link to this page. |
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Type Occurrence of Leogangite |
| Co-type Localities: | Magnesite mine, Inschlag Alp, Schwarzleograben, Hütten, Leogang, Saalfelden, Salzburg, Austria Daniel adit, Schwarzleo District, Schwarzleograben, Hütten, Leogang, Saalfelden, Salzburg, Austria |
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| General Appearance of Type Material: | Aggregates of thin tabular crystals, flattened on {100} and elongated along [010], measuring up to 0.1 mm in length, 0.05 mm in width and 0.01 mm in thickness. |
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| Geological Setting of type material: | Alteration product of arsenic-rich fahlore in vugs of a tennantite-bearing dolomite breccia, intergrown with olivenite and malachite. |
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| Associated Minerals at type locality: | |
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Physical Properties of Leogangite |
| Lustre: | Vitreous |
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| Diaphaneity (Transparency): | Transparent |
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| Colour: | green with a bluish tint |
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| Streak: | light green |
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| Cleavage: | Perfect parallel to (100) |
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| Density (calculated): | 3.55 g/cm3 |
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Crystallography of Leogangite |
| Crystal System: | Monoclinic |
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| Class (H-M): | 2/m - Prismatic |
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| Space Group: | B2/b (B1 1 2/b) [C2/c] {C1 2/c 1} |
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| Cell Parameters: | a = 21.77Å, b = 12.327Å, c = 10.72Å β = 92.85° |
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| Ratio: | a:b:c = 1.766 : 1 : 0.87 |
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| Unit Cell Volume: | V 2873 ų |
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| Z: | 4 |
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| X-Ray Powder Diffraction: | | d-spacing | | Intensity | | 10.85 | | (100) | | hkl = | | (200) | | 2.630 | | (60) | | 5.44 | | (50) | | hkl = | | (400) | | 3.625 | | (50) | | hkl = | | (600) | | 3.090 | | (40) |
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Optical Data of Leogangite |
| Type: | Biaxial (-) |
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| RI values: | nω = 1.590 nε = 1.740 n = 1.744 |
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| 2V: | Measured: 182° |
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| Maximum Birefringence: | δ = 0.150
 Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. |
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| Surface Relief: | High |
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| Comments: | Blue-green to pale green. |
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Chemical Properties of Leogangite |
| Formula: | |
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| All elements listed in formula: | As, Cu, H, O, S |
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| Analyical Data: | Composition by microprobe analysis, average formula based on 20 +/- 3 oxygen atoms.
CuO (49.6 - 52.9)
As2O5 (28.5 - 31.1)
SO3 (4.9 - 5.4) |
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| Empirical Formula: | | Cu | | [(OH) | | |S | | O | | |(As | | Si | | O | | ) | | ] · 8.89 H | | O |
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| Common Impurities: | Si |
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Relationship of Leogangite to other Species |
Related Minerals - Nickel-Strunz Grouping):
- + | |
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Other Names for Leogangite |
| Synonyms: | |
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| Other Languages: | |
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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 Leogangite |
| Reference List: | Lengauer, C. L., Giester, G. and Kirchner, E. (1998): Cu10(AsO4)4(SO4)(OH)6.8H2O, ein neues Mineral aus Leogang, Österreich. Mitt. Österr. Mineral. Ges. 143, 325-327. (in German).
Lengauer, C. L.; Giester, G.; Kirchner, E. (2004): Leogangite, Cu10(AsO4)4(SO4)(OH)6.8H2O, a new mineral from the Leogang mining district, Salzburg province, Austria. Mineralogy and Petrology 81, 187-201.
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Articles/Blogs about Leogangite |
Internet Links for Leogangite |
| Search Engines: |
Look for Leogangite on Google
Look for Leogangite images on Google |
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| External Links: | Look for Leogangite on WebmineralLook for Leogangite on Athena MineralogyLook for Leogangite on WikipediaLook for Leogangite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Leogangite in the Natural History Museum (London) online catalogue |
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| Mineral Dealers: | Search for - Leogangite - on e-Rocks Mineral Sales & AuctionsFine Minerals from Dan Weinrich MineralsFabre Minerals - search for Leogangite specimensThe Arkenstone - Fine MineralsFind Leogangite on www.crystalclassics.co.ukBuy minerals from Mineralium.comWright's Rock Shop - excellent mineral specimens since 1970Wendel Minerals - Auktion & ShopRare and Unusual minerals at Mineralogical Research CompanySearch for Leogangite at Thames Valley MineralsBuy Minerals and Crystals from Crystalarium.comTop quality minerals from Kristalle of California |
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| Jobs: | Mining & Geology Jobs |
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Localities for Leogangite |
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