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Chemical Formula | CdCO3 |
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Composition | Cadmium carbonate |
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Color | White, yellow-brown, reddish-brown |
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Streak | White |
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Hardness | 3½ - 4 |
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Crystal Forms and Aggregates |
(Hexagonal) Occurs as encrustations of tiny rhombohedral crystals |
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Transparency | Translucent |
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Specific Gravity | 5.0 |
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Luster | Adamantine to pearly |
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Cleavage | 1,3 - rhombohedral. Cannot be determined. |
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Fracture | Conchoidal |
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Tenacity | Brittle |
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In Group | Carbonates ; Calcite group |
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All about | Otavite belongs to the calcite group, a group of related carbonates that are isomorphous with one another. They are similar in many physical properties, and may partially or fully replace one another, forming a partial solid solution series. All members of the calcite group crystallize in the trigonal subdivision of the hexagonal system (as rhombohedrons and scalenohedrons), have perfect rhombohedral cleavage, and exhibit a strong double refraction in transparent rhombohedrons. |
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Striking Features | Encrusting crystals, hardness, and crystals |
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Complex Tests | Effervesces in hydrochloric acid |
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Popularity (1-4) | 4 |
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Prevalence (1-3) | 3 |
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Demand (1-3) | 3 |
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Commonly Occurs With |
Azurite, Malachite, Smithsonite |
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Noteworthy Localities |
Tsumeb, Otavi (the origination of the minerals name), Namibia |
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Picture Icon Links |
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Picture Links | Sorry. No Images currently available. |
