Classification of Okayamalite |
| IMA status: | Approved 1997 |
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| Strunz 8th edition ID: | 8/C.02-14
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| Nickel-Strunz 10th (pending) edition ID: | 9.BB.10
9 : SILICATES (Germanates) B : Sorosilicates B : Si2O7 groups, without non-tetrahedral anions; cations in tetrahedral [4] and greater coordination |
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| mindat.org URL: | http://www.mindat.org/min-7202.html Please feel free to link to this page. |
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Type Occurrence of Okayamalite |
| Type Locality: | Fuka mine, Bitchu-cho (Bicchu-cho), Takahashi City, Okayama Prefecture, Chugoku Region, Honshu Island, Japan |
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Physical Properties of Okayamalite |
| Lustre: | Earthy |
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| Colour: | cream white |
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| Streak: | white |
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| Hardness (Mohs): | 5½ |
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| Cleavage: | None Observed |
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Crystallography of Okayamalite |
| Crystal System: | Tetragonal |
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Optical Data of Okayamalite |
| Type: | Uniaxial (-) |
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| RI values: | nω = 1.700 nε = 1.670 |
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| Maximum Birefringence: | δ = 0.030
 Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration. |
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| Surface Relief: | High |
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Chemical Properties of Okayamalite |
| Formula: | |
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| Essential elements: | B, Ca, O, Si |
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| All elements listed in formula: | B, Ca, O, Si |
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Relationship of Okayamalite to other Species |
| Member of: | Melilite Group |
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Other Members of Group:
- + | |
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Related Minerals - Nickel-Strunz Grouping):
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Other Names for Okayamalite |
| 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 Okayamalite |
Reference List:
- + | Mineralogical Magazine (1998): 62: 703-706.
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
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Internet Links for Okayamalite |
| Search Engines: |
Look for Okayamalite on Google
Look for Okayamalite images on Google |
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| External Links: | Look for Okayamalite on WebmineralLook for Okayamalite on Athena MineralogyLook for Okayamalite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure Database |
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| Mineral Dealers: | Wilensky Fine MineralsFind Okayamalite on www.crystalclassics.co.ukRare and Unusual minerals at Mineralogical Research CompanyDAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.High-end worldwide specimens & outstanding customer serviceThe Arkenstone - Fine MineralsMineral Classics - Worldwide Collector Quality Minerals and GemsSearch for minerals at HeliodorSearch for - Okayamalite - on e-Rocks Mineral Sales & AuctionsFine Minerals from Weinrich Minerals, Inc.Edwards Minerals - Fine Specimenswebminerals |
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| Jobs: | Mining & Geology Jobs |
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Localities for Okayamalite |
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
can be used to jump to that position on the map.
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