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Name: |
vivianite |
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Class: |
Phosphates/Arsenates/Vanadates |
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Chemistry: |
Fe3(PO4)3Cl Iron Chloro-phosphate |
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Color(s): |
blue, green, gray-black, Streak: lt. blue, white, brown |
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Hardness: |
1.5 - 2.0 |
SpecGrav: |
2.58 - 2.7 |
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Fracture: |
splintery |
Cleavage: |
perfect |
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Crystal: |
monoclinic (prismatic) sometimes crystals appear bent |
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Envronment: |
principally in disseminated hydrothermal replacement deposits |
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Association: |
muscovite, sphalerite, quarts, pyrite, pyrhotite, siderite |
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Locals: |
| Bavaria/Germany | New Jersey, Colorado, Utah/USA | Brazil | |
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Misc: |
soluble in HCl or HNO3, turns opaque and darker on exposure to light, named after J.G. Vivian, English Mineralogist |
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Photos |
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1.) Moroccocala, Oruro Dept.,Bolivia |
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