Hawleyite

Hawleyite

Infobox mineral
name = Hawleyite
category =
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caption = Orange-yellow earthy coating
formula = CdS
molweight =
color = Bright yellow
habit = Powdery massive
system = Cubic-hextetrahedral
twinning =
cleavage =
fracture =
mohs = 2.5-3
luster = Metallic
refractive =
opticalprop =
birefringence =
pleochroism =
streak = Light yellow
gravity = 4.87
melt =
fusibility =
diagnostic =
solubility =
diaphaneity =
other =

Hawleyite is a rare sulfide mineral in the sphalerite group, dimorphous and easily confused with greenockite. Chemically, it is a cadmium sulfide, and occurs as a bright yellow coating on sphalerite or siderite in vugs, deposited by meteoric waters. It was discovered in 1955 and named in honour of mineralogist James Edwin Hawley, a professor at Queen's University in Ontario, Canada.

ee also

*List of minerals
*List of minerals named after people

References

* [http://www.mindat.org/min-1834.html MinDAT]
* [http://webmineral.com/data/Hawleyite.shtml Webmineral]
* [http://rruff.geo.arizona.edu/doclib/hom/hawleyite.pdf Handbook of Mineralogy] (PDF)


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