Classification of Stoppaniite |
| IMA status: | Approved 1996 |
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| Strunz 8th edition ID: | 8/E.12-25
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| Nickel-Strunz 10th (pending) edition ID: | 9.CJ.05
9 : SILICATES (Germanates) C : Cyclosilicates J : [Si6O18]12- 6-membered single rings (sechser-Einfachringe), without insular complex anions |
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| mindat.org URL: | http://www.mindat.org/min-7315.html Please feel free to link to this page. |
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Type Occurrence of Stoppaniite |
| Type Locality: | Capranica, Vico Lake, Viterbo Province, Latium, Italy |
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Physical Properties of Stoppaniite |
| Lustre: | Vitreous |
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| Diaphaneity (Transparency): | Transparent |
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| Colour: | Light blue |
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| Hardness (Mohs): | 7½ |
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Crystallography of Stoppaniite |
| 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: | P6/mcc {P6/m 2/c 2/c} |
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| Cell Parameters: | a = 9.346Å, c = 9.213Å
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| Ratio: | a:c = 1 : 0.986 |
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| Unit Cell Volume: | V 696.92 ų |
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| Z: | 1 |
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Optical Data of Stoppaniite |
| Type: | Uniaxial (-) |
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| RI values: | nω = 1.625 nε = 1.619 |
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| Maximum Birefringence: | δ = 0.006
 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 Stoppaniite |
| Formula: | | (Na,[ ]) | | (Fe,Al,Mg) | | [Be | | Si | | O | | ]·2H2O |
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| Essential elements: | Be, Fe, H, Na, O, Si |
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| All elements listed in formula: | Al, Be, Fe, H, Mg, Na, O, Si |
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Relationship of Stoppaniite to other Species |
Related Minerals - Nickel-Strunz Grouping):
- + | |
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Other Names for Stoppaniite |
| 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 Stoppaniite |
| Reference List: | European Journal of Mineralogy (1998): 10: 491-496.
European Journal of Mineralogy (2000): 12: 121-127.
Terra Abstracts: 8: 21.
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Internet Links for Stoppaniite |
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| External Links: | Look for Stoppaniite on WebmineralLook for Stoppaniite on Athena MineralogyLook for Stoppaniite on WikipediaLook for Stoppaniite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Stoppaniite in the Natural History Museum (London) online catalogue |
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Localities for Stoppaniite |