Classification of Akhtenskite |
| IMA status: | Approved 1982 |
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| Strunz 8th edition ID: | 4/D.10-15
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| Nickel-Strunz 10th (pending) edition ID: | 4.DB.15
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates) D : Metal: Oxygen = 1:2 and similar B : With medium-sized cations; chains of edge-sharing octahedra |
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| Dana 8th edition ID: | 4.4.10.1
4 : SIMPLE OXIDES 4 : AX2 |
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| Hey's CIM Ref.: | 7.18.5
7 : Oxides and Hydroxides 18 : Oxides of Mn |
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| mindat.org URL: | http://www.mindat.org/min-71.html Please feel free to link to this page. |
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Type Occurrence of Akhtenskite |
| Type Locality: | Akhtenskoye Fe deposit, Magnitka, Chelyabinsk Oblast', Urals Region, Russia |
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| Place of Conservation of Type Material: | Mining Institute, St Petersburg, Russia |
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| Year of Discovery: | 1979 |
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| Geological Setting of type material: | in "psilomelane" with other manganese oxides in an iron oxide deposit, probably bacterially altered from a previous mineral |
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| Associated Minerals at type locality: | |
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Physical Properties of Akhtenskite |
| Diaphaneity (Transparency): | Opaque |
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| Colour: | Light grey to black |
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| Streak: | black |
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| Cleavage: | Distinct/Good on {001} |
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| Density (calculated): | 4.78 g/cm3 |
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Crystallography of Akhtenskite |
| 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 = 2.84Å, c = 4.6Å
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| Ratio: | a:c = 1 : 1.62 |
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| Unit Cell Volume: | V 32.13 ų (Calculated from Unit Cell) |
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| Z: | 1 |
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| Morphology: | as microscopic crystals, flaky to platy on {001}, in parallel aggregates, sometimes in rows at 120°, probably due to replacement of an earlier hexagonal mineral;
as flaky polycrystalline aggregates |
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| X-Ray Powder Diffraction: | | d-spacing | | Intensity | | 1.42 | | ( | | 1.65 | | ( | | 2.15 | | ( |
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| Comments: | Material from Mount Zarod, Russia; XRD pattern calculated from an electron diffraction pattern |
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Optical Data of Akhtenskite |
| Type: | Uniaxial |
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Chemical Properties of Akhtenskite |
| Formula: | |
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| Essential elements: | Mn, O |
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| All elements listed in formula: | Mn, O |
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| Analyical Data: | Sufficient material for direct chemical analysis cannot be separated.
Energy-dispersive analysis shows Mn as the only cationic species; Mn4+ and O2- were confirmed by X-ray photoelectron spectroscopy, as was the absence of OH- and H2O. |
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Relationship of Akhtenskite 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 Akhtenskite |
| Synonyms: | |
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| German names: | |
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| Russian 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 Akhtenskite |
| Reference List: | Chukhrov, F. V., Gorshkov, A. I. and Drits, V. S. (1987): Advances in the crystal chemistry of manganese oxides. Zap. Vses. Mineral. Obshch. 16, 210-221 (in Russian). - American Mineralogist (1990) 75, 931 (abstract)
Chukhrov, F. V., Gorshkov, A. I., Sivtsov, A. V., Berezovskaya, V. V., Dikov, Y. P., Dubinina, G. A. and Varinov, N. N. (1989): Akhtenskite - the natural analog of ε-MnO2. Izvestiya Akademii Nauk SSSR, Ser. Geol. 9, 75-80 (in Russian). - American Mineralogist (1990) 75, 931 (abstract).
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 9. |
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Internet Links for Akhtenskite |
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| External Links: | Look for Akhtenskite on WebmineralLook for Akhtenskite on Athena MineralogyLook for Akhtenskite on WikipediaLook for Akhtenskite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Akhtenskite in the Natural History Museum (London) online catalogueAkhtenskite details from Handbook of Mineralogy (PDF) |
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Localities for Akhtenskite |