Classification of Caswellsilverite |
| IMA status: | Approved |
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| Strunz 8th edition ID: | 2/F.08-10
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| Nickel-Strunz 10th (pending) edition ID: | 2.FB.05
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
B : With alkalies (without Cl, etc.) |
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| Dana 8th edition ID: | 2.9.17.1
2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1 |
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| Hey's CIM Ref.: | 3.8.2
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
8 : Sulphides etc. of Cr, Mo, W an Mn |
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| mindat.org URL: | http://www.mindat.org/min-918.html
Please feel free to link to this page. |
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Type Occurrence of Caswellsilverite |
| Type Locality: | Norton County meteorite, Norton Co., Kansas, USA |
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| Year of Discovery: | 1982 |
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| Geological Setting of type material: | Enstatite achondrite |
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Occurrences of Caswellsilverite |
| Geological Setting: | Meteorites |
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Physical Properties of Caswellsilverite |
| Lustre: | Metallic |
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| Diaphaneity (Transparency): | Opaque |
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| Colour: | Yellowish-grey, Grey |
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| Hardness (Mohs): | 2 |
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| Hardness (Vickers): | VHN15=17 - 45 kg/mm2 |
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| Comment: | Vickers hardness on synthetic material |
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| Density (calculated): | 3.23 g/cm3 |
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Crystallography of Caswellsilverite |
| Crystal System: | Trigonal |
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| Class (H-M): | 3m (3 2/m) - Hexagonal Scalenohedral |
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| Space Group: | R3m {R3 2/m} |
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| Space Group Setting: | R3m |
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| Cell Parameters: | a = 3.54Å, c = 19.35Å
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| Ratio: | a:c = 1 : 5.466 |
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| Unit Cell Volume: | V 210.00 ų (Calculated from Unit Cell) |
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| Z: | 3 |
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| Morphology: | Anhedral grains to 1mm |
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| Twinning: | Lamellar twinning (may be result of pressure induce deformation) |
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Optical Data of Caswellsilverite |
| Type: | Anisotropic |
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| Anisotropism: | Strong |
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| Bireflectance: | Strong |
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| Colour in reflected light: | Yellow-gray to light gray |
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| Pleochroism: | Visible |
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| Comments: | Pale yellow to gray in air, pale yellow with greenish tint to gray in oil. |
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Chemical Properties of Caswellsilverite |
| Formula: | |
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| Essential elements: | Cr, Na, S |
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| All elements listed in formula: | Cr, Na, S |
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| Common Impurities: | Fe,Ca,Mg,Mn,Ti |
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Relationship of Caswellsilverite to other Species |
| Common Associates: | |
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Related Minerals - Nickel-Strunz Grouping):
- + | |
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Related Minerals - Hey's Index Grouping:
- + | |
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Other Names for Caswellsilverite |
| 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 Caswellsilverite |
Reference List:
- + | American Mineralogist: 67: 132-136.
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Internet Links for Caswellsilverite |
| Search Engines: |
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| External Links: | Look for Caswellsilverite on WebmineralLook for Caswellsilverite on Athena MineralogyLook for Caswellsilverite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseCaswellsilverite details from Handbook of Mineralogy (PDF) |
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| Jobs: | Mining & Geology Jobs |
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Localities for Caswellsilverite |
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the  symbol to view information about a locality.
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