Pecoraite

Pecoraite
Pecoraite from Eden, Vermont
General
Category	Phyllosilicate minerals
Group	Kaolinite-Serpentine group, serpentine subgroup
Formula	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] Pecoraite 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.

See also

• Nepouite  – Phyllosilicate mineral in the serpentine subgroupPages displaying short descriptions of redirect targets

References

1. Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi: 10.1180/mgm.2021.43 . S2CID   235729616.
2. "Mineralogy Database". Mindat. Retrieved 2013-03-21.
3. "Webmineral" . Retrieved 2013-03-21.