Baileychlore
A zinc-rich member of the chlorite group — the greenish phyllosilicates common in low-grade metamorphic and altered igneous rocks.
Intro adapted from Wikipedia (CC BY-SA).
Baileychlore is an IMA-recognized mineral species in the silicate class, with the chemical formula (Zn,Fe²⁺,Al,Mg)₆(Si,Al)₄O₁₀(OH)₈.
It crystallizes in the monoclinic crystal system (space group Ib). It is a member of the Chlorite, Clay structural group.
Key properties: Mohs hardness 5; specific gravity 3.18; optically biaxial.
IMA symbol Blc, IMA status: approved, named in 1986.
Occurs as rims on colloform calcite veins, within a strongly oxidized collapse karst-breccia containing skarn clasts.
It is found associated with Andesine, garnet, vesuvianite, zincian chamosite, goethite, hematite, chalcocite, copper, malachite, calcite.
The name refers to Professor Sturges W. Bailey (1919–1994), Department of Geology and Geophysics, University of Wisconsin, Madison, Wisconsin, USA.