Classification of Sederholmite |
| IMA status: | Approved |
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| Strunz 8th edition ID: | 2/C.20-50
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| Nickel-Strunz 10th (pending) edition ID: | 2.CC.05
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.) C : Metal Sulfides, M: S = 1: 1 (and similar) C : With Ni, Fe, Co, PGE, etc. |
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| Dana 8th edition ID: | 2.8.11.3
2 : SULFIDES 8 : AmXp, with m:p = 1:1 |
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| Hey's CIM Ref.: | 3.11.15
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1) 11 : Sulphides etc. of Ni |
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| mindat.org URL: | http://www.mindat.org/min-3601.html Please feel free to link to this page. |
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Type Occurrence of Sederholmite |
| Type Locality: | Kuusamo, Oulun (Oulu) Lääni, Finland |
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| Year of Discovery: | 1964 |
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| Geological Setting of type material: | Calcite veins containing nickel selenides |
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Physical Properties of Sederholmite |
| Lustre: | Metallic |
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| Diaphaneity (Transparency): | Opaque |
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| Colour: | Brass-yellow to orange-yellow |
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| Hardness (Mohs): | 2½ - 3 |
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| Tenacity: | Brittle |
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| Cleavage: | None Observed |
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| Fracture: | Irregular/Uneven, Sub-Conchoidal |
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| Density (calculated): | 7.11 g/cm3 |
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Crystallography of Sederholmite |
| Crystal System: | Hexagonal |
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| Class (H-M): | 6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal |
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| Space Group: | P63/mmc {P63/m 2/m 2/c} |
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| Cell Parameters: | a = 3.624Å, c = 5.288Å
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| Ratio: | a:c = 1 : 1.459 |
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| Unit Cell Volume: | V 60.14 ų (Calculated from Unit Cell) |
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| Z: | 2 |
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| Morphology: | Microscopic grains |
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| X-Ray Powder Diffraction: | | d-spacing | | Intensity | | 2.70 | | (100) | | 2.02 | | (80) | | 1.81 | | (60) | | 1.54 | | (40) | | 1.50 | | (40) | | 1.35 | | (30) | | 1.16 | | (30) |
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| Comments: | 18-0888 |
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Chemical Properties of Sederholmite |
| Formula: | |
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| Essential elements: | Ni, Se |
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| All elements listed in formula: | Ni, Se |
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| Common Impurities: | Co |
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Relationship of Sederholmite 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 Sederholmite |
| 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 Sederholmite |
| Reference List: | American Mineralogist (1965): 50: 519-520.
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Internet Links for Sederholmite |
| Search Engines: |
Look for Sederholmite on Google
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| External Links: | Look for Sederholmite on WebmineralLook for Sederholmite on Athena MineralogyLook for Sederholmite on WikipediaLook for Sederholmite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Sederholmite in the Natural History Museum (London) online catalogueSederholmite details from Handbook of Mineralogy (PDF) |
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| Mineral Dealers: | Search for - Sederholmite - on e-Rocks Mineral Sales & AuctionsThe Arkenstone - Fine MineralsMineral Classics - Worldwide Collector Quality Minerals and GemsFabre Minerals - search for Sederholmite specimensLapis Mineral MagazinFind Sederholmite on www.crystalclassics.co.ukWendel Minerals - Auktion & ShopRare and Unusual minerals at Mineralogical Research CompanyBuy minerals from Mineralium.comFine Minerals from Dan Weinrich MineralsSpiriferMinerals.com - high quality specimensTop quality minerals from Kristalle of California |
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Localities for Sederholmite |