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, 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 |
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 WikipediaLook for Okayamalite on Mineralien AtlasRaman and XRD data at RRUFF projectAmerican Mineralogist Crystal Structure DatabaseSearch for Okayamalite in the Natural History Museum (London) online catalogue |
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Localities for Okayamalite |