Classification of Slawsonite |
| IMA status: | Approved |
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| Strunz 8th edition ID: | 8/J.06-80
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| Nickel-Strunz 10th (pending) edition ID: | 9.FA.50
9 : SILICATES (Germanates) F : Tektosilicates without zeolitic H2O A : Tektosilicates without additional non-tetrahedral anions |
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| Dana 8th edition ID: | 76.1.5.2
76 : TECTOSILICATES Al-Si Framework 1 : Al-Si Framework with Al-Si frameworks |
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| Hey's CIM Ref.: | 16.12.2
16 : Silicates Containing Aluminum and other Metals 12 : Aluminosilicates of Sr, Ba and Zn |
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| mindat.org URL: | http://www.mindat.org/min-3684.html Please feel free to link to this page. |
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Type Occurrence of Slawsonite |
| Type Locality: | Martin Bridge formation, Wallowa Co., Oregon, USA |
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| Year of Discovery: | 1977 |
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Physical Properties of Slawsonite |
| Lustre: | Vitreous |
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| Diaphaneity (Transparency): | Transparent |
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| Colour: | Colourless, gray |
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| Hardness (Mohs): | 5½ - 6½ |
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Crystallography of Slawsonite |
| Crystal System: | Monoclinic |
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| Cell Parameters: | a = 8.89Å, b = 9.35Å, c = 8.33Å
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| Ratio: | a:b:c = 0.951 : 1 : 0.891 |
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| Unit Cell Volume: | V 0.00 ų (Calculated from Unit Cell) |
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Optical Data of Slawsonite |
| Type: | Biaxial (-) |
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| RI values: | nα = 1.570 - 1.573 nβ = 1.581 - 1.582 nγ = 1.585 - 1.586 |
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| 2V: | Measured: 55° to 82°, Calculated: 60° to 66° |
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| Maximum Birefringence: | δ = 0.015
 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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| Dispersion: | r < v medium |
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Chemical Properties of Slawsonite |
| Formula: | |
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| Essential elements: | Al, O, Si, Sr |
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| All elements listed in formula: | Al, Ca, O, Si, Sr |
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| Common Impurities: | Ti,Fe,Mg,Na,K,H2O |
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Relationship of Slawsonite to other Species |
| Related Minerals - Nickel-Strunz Grouping): | |
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| Related Minerals - Hey's Index Grouping: | | 16.12.1 | Stronalsite | | | 16.12.3 | Brewsterite | | | 16.12.4 | Celsian | | | 16.12.5 | Paracelsian | | | 16.12.6 | Cymrite | | | 16.12.7 | Edingtonite | | | 16.12.8 | Banalsite | | | 16.12.9 | Harmotome | | (Ba | | ,Ca | | ,K,Na) | | [Al | | Si | | O | | ] ·12H | | O |
| | 16.12.10 | Hyalophane | | | 16.12.11 | Balipholite | | | 16.12.12 | Armenite | | | 16.12.13 | Wellsite | | | 16.12.14 | Merlinoite | | | 16.12.15 | Anandite | | (Ba,K)(Fe | | ,Mg) | | [(O,OH) | | |(Si,Al,Fe) | | O | | ] |
| | 16.12.16 | Fraipontite | | | 16.12.17 | Sauconite | | | 16.12.18 | Minehillite | | | 16.12.19 | Hendricksite | | | 16.12.20 | Baileychlore | | (Zn,Fe,Al,Mg) | | (Si,Al) | | O | | (OH) | | |
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Other Names for Slawsonite |
| 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 Slawsonite |
| Reference List: | American Mineralogist (1977): 62: 31-35.
American Mineralogist (1987): 72: 225-226.
Zeitschrift für Kristallographie: 210: 741-745.
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Internet Links for Slawsonite |
| Search Engines: |
Look for Slawsonite on Google
Look for Slawsonite images on Google |
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| External Links: | Look for Slawsonite on WebmineralLook for Slawsonite on Athena MineralogyLook for Slawsonite on WikipediaLook for Slawsonite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Slawsonite in the Natural History Museum (London) online catalogueSlawsonite details from Handbook of Mineralogy (PDF) |
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| Mineral Dealers: | Wright's Rock Shop - excellent mineral specimens since 1970Buy Minerals and Crystals from Crystalarium.comThe Arkenstone - Fine MineralsFine Minerals from Dan Weinrich MineralsMineral Classics - Worldwide Collector Quality Minerals and GemsLapis Mineral Magazine-Rocks - Mineral Auctions and SalesHigh-end worldwide specimens & outstanding customer serviceBuy fine minerals and gemstones from Pala Internationalrare and unusual minerals mainly crystallizedSearch for Slawsonite at Thames Valley MineralsFind Slawsonite on www.crystalclassics.co.uk |
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Localities for Slawsonite |