Name:

vivianite

A photo of the mineral vivianite

Class:

Phosphates/Arsenates/Vanadates

Chemistry:

Fe3(PO4)3Cl Iron Chloro-phosphate

Color(s):

blue, green, gray-black, Streak: lt. blue, white, brown

Hardness:

1.5 - 2.0

SpecGrav:

2.58 - 2.7

Fracture:

splintery

Cleavage:

perfect

Crystal:

monoclinic (prismatic) sometimes crystals appear bent

Envronment:

principally in disseminated hydrothermal replacement deposits

Association:

muscovite, sphalerite, quarts, pyrite, pyrhotite, siderite

Locals:

| Bavaria/Germany | New Jersey, Colorado, Utah/USA | Brazil |

Misc:

soluble in HCl or HNO3, turns opaque and darker on exposure to light, named after J.G. Vivian, English Mineralogist

Photos
& Locals:

1.) Moroccocala, Oruro Dept.,Bolivia
2.) Moroccocala, Oruro Dept.,Bolivia

3.) Moroccocala, Oruro Dept.,Bolivia

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