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Chemical Formula | NaFe3+3(SO4)2(OH)6 |
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Composition | Basic hydrous sodium iron sulfate |
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Color | Yellow-brown to brown |
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Streak | Light yellow |
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Hardness | 3 - 3½ |
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Crystal Forms and Aggregates |
(Hexagonal) Occurs only in tiny crystals, which are hexagonal or triangular shaped, and may also be tabular or pseudocubic. Also occurs grainy, as fibrous crusts, in nodules, and in thin, hexagonal scales. |
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Transparency | Translucent |
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Specific Gravity | 3.1 - 3.3 |
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Luster | Resinous to subadamantine |
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Cleavage | 2,1 - basal (usually cannot be determined) |
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Fracture | Conchoidal, uneven |
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Tenacity | Brittle |
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Other Names |  Utahite |
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In Group | Sulfates ; Hydrous sulfates |
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Striking Features | Crystal habits and color |
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Popularity (1-4) | 3 |
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Prevalence (1-3) | 3 |
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Demand (1-3) | 3 |
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Distinguishing Similar Minerals |
Natrojarosite's crystal forms combined with its color easily identify it. However, poorly crystallized examples and massive forms of Natrojarosite may be difficult to distinguish from other minerals, such as Limonite. Natrojarosite is also indistinguishable from its isomorphous mineral Jarosite by ordinary methods. |
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Commonly Occurs With |
Goethite, Pyrite, Galena, Barite |
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Noteworthy Localities |
Laurium, Greece; Francon Quarry, Montreal, Quebec, Canada; Rapid Creek area, Yukon Territory, Canada; and Palos Verdes Hills, Los Angeles Co., California. |
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Picture Icon Links |
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Picture Links | Sorry. No Images currently available. |
