Classification of Scheuchzerite |
| IMA status: | Approved 2004 |
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| Nickel-Strunz 10th (pending) edition ID: | 9.DM.35
9 : SILICATES (Germanates) D : Inosilicates M : Inosilicates with 6-periodic single chains |
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Type Occurrence of Scheuchzerite |
| Type Locality: | Fianel Mine, Ausserferrera, Ferrera Valley, Hinterrhein Valley, Grischun (Grisons; Graubünden), Switzerland |
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| General Appearance of Type Material: | acicular crystals up to 0.5 mm in length |
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| Place of Conservation of Type Material: | Musée Géologique Cantonal, Lausanne, Switzerland (hlotype specimen, MGL 79355). |
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| Geological Setting of type material: | Manganese-bearing veins resulting from the remobilization of ore components during retrograde Tertiary Alpine metamorphism |
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| Associated Minerals at type locality: | |
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Physical Properties of Scheuchzerite |
| Lustre: | Vitreous |
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| Diaphaneity (Transparency): | Transparent |
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| Colour: | Yellow-orange |
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| Streak: | Yellow-orange |
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| Hardness (Mohs): | 2½ |
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| Cleavage: | Distinct/Good |
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| Density (measured): | 3.5 g/cm3 |
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| Density (calculated): | 3.47 g/cm3 |
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Crystallography of Scheuchzerite |
| Crystal System: | Triclinic |
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| Class (H-M): | 1 - Pinacoidal |
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| Space Group: | P1 |
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| Cell Parameters: | a = 9.831Å, b = 10.107Å, c = 13.855Å α = 86.222°, β = 73.383°, γ = 71.987° |
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| Ratio: | a:b:c = 0.973 : 1 : 1.371 |
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| Unit Cell Volume: | V 1254.2 ų |
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| Z: | 2 |
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| X-Ray Powder Diffraction: | | d-spacing | | Intensity | | 8.68 | | (50) | | 7.91 | | (70) | | 4.83 | | (30) | | 3.94 | | (30) | | 3.22 | | (40) | | 3.09 | | (80) | | 2.92 | | (40) |
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| Comments: | From type description |
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Optical Data of Scheuchzerite |
| Type: | Biaxial (+) |
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| Pleochroism: | Weak |
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| Comments: | X: brown yellow
Y: pale yellow |
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Chemical Properties of Scheuchzerite |
| Formula: | | Na(Mn,Mg,Zn) | | [VSi | | O | | (OH)](OH) | | |
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| All elements listed in formula: | H, Mg, Mn, Na, O, Si, V, Zn |
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Relationship of Scheuchzerite to other Species |
Related Minerals - Nickel-Strunz Grouping):
- + | |
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Other Names for Scheuchzerite |
| 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 Scheuchzerite |
| Reference List: | Brugger, J., Krivovichev, S., Meisser, N., Ansermet, S. & Armbruster, T. (2006): Scheuchzerite, Na(Mn,Mg)9[VSi9O28(OH)](OH)3 , a new single-chain silicate. American Mineralogist 91, 937-943.
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Internet Links for Scheuchzerite |
| Search Engines: |
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| External Links: | Look for Scheuchzerite on WebmineralLook for Scheuchzerite on Athena MineralogyLook for Scheuchzerite on WikipediaLook for Scheuchzerite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Scheuchzerite in the Natural History Museum (London) online catalogue |
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Localities for Scheuchzerite |