|
Chemical Formula |
(Ni,Mg,Fe)CO3 |
|
Composition |
Carbonate of nickel, magnesium and iron |
|
Color |
Pale green, apple-green, yellowish-green, bright green |
|
Streak |
Yellow-green |
|
Hardness |
4.5 - 5 |
|
Crystal System |
Hexagonal |
|
Crystal Forms |
Rhombohedrons, as well as compact groups of scalenohedrons occur, although rarely. Mostly occurs as crusts, botryoidal, and as ball shaped aggregates. |
|
Transparency |
Transparent to translucent |
|
Specific Gravity |
3.7 |
|
Luster |
Vitreous to dull |
|
Cleavage |
1,3 - rhombohedral |
|
Fracture |
Uneven |
|
Tenacity |
Brittle |
|
Complex Tests |
Effervesces in hydrochloric acid |
|
In Group |
Carbonates; Calcite Group |
|
Striking Features |
Distinct color and mode of occurrence in nickel deposits |
|
Environment |
In the oxidation zone of nickel deposits. |
|
Rock Type |
Metamorphic |
|
Popularity (1-4) |
2 |
|
Prevalence (1-3) |
3 |
|
Demand (1-3) |
1 |


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