Pecoraite

{{Short description|Phyllosilicate mineral in the serpentine subgroup}} {{Infobox mineral | name = Pecoraite | category = Phyllosilicate minerals | group = Kaolinite-Serpentine group, serpentine subgroup | boxwidth = | image = Pecoraite, Eden Vermont.jpg | caption = Pecoraite from Eden, Vermont | formula = {{chem2|Ni3(Si2O5)(OH)4}} | IMAsymbol = Pco<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|journal=Mineralogical Magazine|volume=85|issue=3 |pages=291–320|doi=10.1180/mgm.2021.43 |bibcode=2021MinM...85..291W |s2cid=235729616 |doi-access=free}}</ref> | strunz = 9.ED.15 | system = Monoclinic <br/>Unknown space group | class = | symmetry = | color = Green, blue-green yellow-green | mohs = 2.5–3 | luster = Waxy, earthy | streak = Pale green | 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 {{chem2|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.<ref>{{cite web|title=Mineralogy Database|url=http://www.mindat.org/min-3139.html|work=Mindat|accessdate=2013-03-21}}</ref> Pecoraite is typically a green, lime green, or bluegreen mineral with a waxy, or earthy luster and a mohs hardness of 2.5.<ref>{{cite web|title=Webmineral|url=http://webmineral.com/data/Pecoraite.shtml|accessdate=2013-03-21}}</ref> Common textural habits associated with pecoraite are curved plates, spirals and tubes. It can also be granular and massive.

== See also == * {{Annotated link|Nepouite}}

== References == {{Reflist}}

Category:Nickel minerals Category:Monoclinic minerals Category:Serpentine subgroup