Name: |
millerite |
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Class: |
Sulfides |
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Chemistry: |
NiS Nickel Sulfide |
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Color(s): |
gray, yellowish, brassy, metallic |
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Hardness: |
3 - 3.5 |
SpecGrav: |
5.3 - 5.5 |
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Fracture: |
splintery |
Cleavage: |
perfect |
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Crystal: |
hexagonal (usually slender, hair-like, acicular crystals, often radiating groups) |
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Envronment: |
hydrothermal replacement deposits, volcanic exhalation product. |
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Association: |
calcite, chalcopyrite, sphalerite, galena, linneite, gerdorffite |
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Locals: |
| Michigan, New York, Pennsylvania, USA | Canada | Germany | |
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Misc: |
Named for the English minerologist, W. H. Miller. Soluble in HNO3 and aqua-regia. |
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