Category Silicate mineral Strunz classification 9.ED.15 | Formula
(repeating unit) Ni3(Si2O5)(OH)4 Mohs scale hardness 2.5-3 | |
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Crystal system Monoclinic
Unknown space group Color Green, blue-green yellow-green | ||
Pecoraite is a nickel silicate mineral and a member of the serpentine group. 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 as shears in ultramafic rocks. Pecoriate is typically a green, lime green, or bluegreen mineral with a waxy, or earthy luster and a mohs hardness of 2.5. Common textural habits associated with Pecoraite are curved plates, spirals and tubes. It can also be granular and massive.
References
Pecoraite Wikipedia(Text) CC BY-SA