Classification of Alarsite |
| IMA status: | Approved 1993 |
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| Strunz 8th edition ID: | 7/A.01-12
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| Nickel-Strunz 10th (pending) edition ID: | 8.AA.05
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
A : With small cations (some also with larger ones) |
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| mindat.org URL: | http://www.mindat.org/min-94.html
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Type Occurrence of Alarsite |
| Type Locality: | Great Fissure (Main Fracture) eruption, Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia |
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| Place of Conservation of Type Material: | Mining Institute, St. Petersburg, Russia. |
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| Geological Setting of type material: | Fumarolic exhalations |
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| Associated Minerals at type locality: | |
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Physical Properties of Alarsite |
| Lustre: | Vitreous |
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| Diaphaneity (Transparency): | Transparent, Translucent |
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| Colour: | Colorless, with pale tints of yellow, green, blue due to inclusions |
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| Comment: | colorless in transmitted light |
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| Streak: | White |
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| Hardness (Mohs): | 5 - 5½ |
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| Tenacity: | Brittle |
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| Cleavage: | None Observed |
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| Density (calculated): | 3.32 g/cm3 |
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Crystallography of Alarsite |
| Crystal System: | Trigonal |
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| Class (H-M): | 3 2 - Trapezohedral |
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| Space Group: | P31 2 1 |
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| Morphology: | Subhedral grains, to 0.3 mm, in aggregates. |
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| Comment: | Possibly P3221 |
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| X-Ray Powder Diffraction: | | d-spacing | | Intensity | | 4.36 | | (20) | | 4.06 | | (31) | | 3.442 | | (100) | | 2.514 | | (80) | | 2.359 | | (15) | | 1.873 | | (16) | | 1.4202 | | (11) |
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Optical Data of Alarsite |
| Type: | Uniaxial (+) |
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| RI values: | nω = 1.596 nε = 1.608 |
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| Birefringence: | 0.012 |
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| Maximum Birefringence: | δ = 0.012
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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| Optical Extinction: | Parallel. |
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| Pleochroism: | Non-pleochroic |
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Chemical Properties of Alarsite |
| Formula: | |
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| Essential elements: | Al, As, O |
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| All elements listed in formula: | Al, As, O |
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Relationship of Alarsite to other Species |
Related Minerals - Nickel-Strunz Grouping):
- + | |
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Other Names for Alarsite |
| Synonyms: | |
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| Other Languages: | |
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Other Information |
| Fluorescence in UV light: | Not fluorescent |
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| 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 Alarsite |
Reference List:
- + | Tatyana Fedorovna Semenova, Lidiya Pavlovna Vergasova, Stanislav Konstantinovich Filatov, and Vasiliy Viktorovich Ananev, 1994, Alarsite AlAsO4: a New Mineral from Volcanic Exhalations, Doklady Akademii Nauk: 338(4): 501-505.
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Internet Links for Alarsite |
| Search Engines: |
Look for Alarsite on Google
Look for Alarsite images on Google |
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| External Links: | Look for Alarsite on WebmineralLook for Alarsite on Athena Mineralogy [Link dead]Look for Alarsite on WikipediaLook for Alarsite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseAlarsite details from Handbook of Mineralogy (PDF) |
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| Jobs: | Mining & Geology Jobs |
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Localities for Alarsite |
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the  symbol to view information about a locality.
The symbol next to localities in the list
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Mineral and Locality Search
