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Chemical Formula | Zn2(AsO4)(OH) |
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Composition | Basic Zinc Arsenate |
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Color | Pale to dark yellow |
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Streak | White |
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Hardness | 3½ |
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Crystal Forms and Aggregates |
(Triclinic) Tabular, often rounded crystals occur, usually small and in groups |
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Transparency | Transparent to translucent |
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Specific Gravity | 4.5 |
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Luster | Vitreous |
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Cleavage | 1,3 |
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Fracture | Uneven |
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Tenacity | Brittle |
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Other ID Marks | Fluorescent yellow or yellow green in shortwave ultraviolet light |
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Polymorphs | Adamite |
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In Group | Phosphates ; Arsenates |
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All About | Paradamite crystals are always embedded in rusting, crumbly, brown Limonite that stain the hands. Since the Limonite crumbles when scrubbed, care must be exercised when washing a specimen of Paradamite. |
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Striking Features | Association with Limonite, fluorescence. |
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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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Distinguishing Similar Minerals |
Olivenite - usually has a
greener color and usually occurs in tall, thin crystals Smithsonite - usually occurs finely globular, and doesn't fluoresce Adamite - different crystal form |
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Commonly Occurs With |
Limonite, Adamite, Aurichalcite, Austinite, Mimetite, Wulfenite, Hemimorphite |
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Noteworthy Localities |
The only locality worthy of mentioning is the Ojuela Mine, in Mapimi, Durango, Mexico, where it occurs in very minute quantities. |
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Picture Icon Links |
Sorry. No Images currently available. |
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Picture Links | Sorry. No Images currently available. |
