Pecoraite

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Pecoraite
Pecoraite, Eden Vermont.jpg
Pecoraite from Eden, Vermont
General
CategorySilicate mineral
Formula
(repeating unit)
Ni3(Si2O5)(OH)4
Strunz classification9.ED.15
Crystal systemMonoclinic
Unknown space group
Identification
ColorGreen, blue-green yellow-green
Mohs scale hardness2.5-3
LusterWaxy, earthy
StreakPale green
Specific gravity3.084

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.[1] Pecoriate is typically a green, lime green, or bluegreen mineral with a waxy, or earthy luster and a mohs hardness of 2.5.[2] Common textural habits associated with Pecoraite are curved plates, spirals and tubes. It can also be granular and massive.

References[edit]

  1. ^ "Mineralogy Database". Mindat. Retrieved 2013-03-21.
  2. ^ "Webmineral". Retrieved 2013-03-21.