Classification of Janggunite |
| IMA status: | Approved |
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| Strunz 8th edition ID: | 4/D.13-10
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| Nickel-Strunz 10th (pending) edition ID: | 4.FG.05
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates) F : Hydroxides (without V or U) G : Hydroxides with OH, without H2O; unclassified |
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| Dana 8th edition ID: | 6.4.7.1
6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL 4 : Miscellaneous |
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| Hey's CIM Ref.: | 7.19.2
7 : Oxides and Hydroxides 19 : Oxides of Mn and Fe |
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| mindat.org URL: | http://www.mindat.org/min-2073.html Please feel free to link to this page. |
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Type Occurrence of Janggunite |
| Type Locality: | Janggun mine, Bonghwa-gun, Gyeongsangbuk-do (Kyongsang-bukto; Gyeongsangbugdo), South Korea |
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| Year of Discovery: | 1976 |
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Physical Properties of Janggunite |
| Lustre: | Dull |
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| Colour: | black |
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| Streak: | brownish black to dark brown |
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| Hardness (Mohs): | 2 - 3 |
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| Hardness Data: | Measured |
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| Tenacity: | Fragile |
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| Cleavage: | Perfect one direction |
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| Density (measured): | 3.59 g/cm3 |
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| Density (calculated): | 3.58 g/cm3 |
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Crystallography of Janggunite |
| Crystal System: | Orthorhombic |
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| Cell Parameters: | a = 9.324Å, b = 14.05Å, c = 7.956Å
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| Ratio: | a:b:c = 0.664 : 1 : 0.566 |
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| Unit Cell Volume: | V 1,042.25 ų (Calculated from Unit Cell) |
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| Z: | 4 |
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Optical Data of Janggunite |
| Type: | Biaxial |
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| Type: | Anisotropic |
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| Anisotropism: | very strong, yellowish brown with bluish tint |
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| Colour in reflected light: | grayish white to gray |
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Chemical Properties of Janggunite |
| Formula: | |
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| Essential elements: | H, Mn, O |
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| All elements listed in formula: | Fe, H, Mn, O |
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Relationship of Janggunite 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 Janggunite |
| 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 Janggunite |
| Reference List: | Min. Mag. 41, 519-523(1977)[Am.Min. (1978): 63: 794 (abstract)]
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Internet Links for Janggunite |
| Search Engines: |
Look for Janggunite on Google
Look for Janggunite images on Google |
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| External Links: | Look for Janggunite on WebmineralLook for Janggunite on Athena MineralogyLook for Janggunite on WikipediaLook for Janggunite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Janggunite in the Natural History Museum (London) online catalogueJanggunite details from Handbook of Mineralogy (PDF) |
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| Mineral Dealers: | Rare and Unusual minerals at Mineralogical Research Companyrare and unusual minerals mainly crystallizedFine Minerals from Dan Weinrich Mineralse-Rocks - Mineral Auctions and SalesWright's Rock Shop - excellent mineral specimens since 1970Fabre Minerals - search for Janggunite specimensWilensky Fine MineralsWendel Minerals - Auktion & ShopFind Janggunite on www.crystalclassics.co.ukBuy fine minerals and gemstones from Pala InternationalLapis Mineral MagazinBuy Minerals and Crystals from Crystalarium.com |
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| Jobs: | Mining & Geology Jobs |
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Localities for Janggunite |