Pecoraite
Pecoraite | |
---|---|
General | |
Category | Silicate mineral |
Formula (repeating unit) | Ni3(Si2O5)(OH)4 |
IMA symbol | Pco[1] |
Strunz classification | 9.ED.15 |
Crystal system | Monoclinic Unknown space group |
Identification | |
Color | Green, blue-green yellow-green |
Mohs scale hardness | 2.5-3 |
Luster | Waxy, earthy |
Streak | Pale green |
Specific gravity | 3.084 |
Pecoraite is a nickel silicate mineral and a member of the serpentine group. It was named after geologist William Thomas Pecora. It is monoclinic and has a chemical composition of Ni3(Si2O5)(OH)4. It is associated with the weathering-and-or oxidation of meteorites or nickel sulfide minerals such as millerite. It is also found in altered ultramafic rocks.[2] Pecoriate is typically a green, lime green, or bluegreen mineral with a waxy, or earthy luster and a mohs hardness of 2.5.[3] Common textural habits associated with Pecoraite are curved plates, spirals and tubes. It can also be granular and massive.
References[]
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85: 291–320.
- ^ "Mineralogy Database". Mindat. Retrieved 2013-03-21.
- ^ "Webmineral". Retrieved 2013-03-21.
Categories:
- Nickel minerals
- Monoclinic minerals
- Serpentine group
- Silicate mineral stubs