Chemistry:Hawleyite

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Hawleyite
Hawleyite.jpg
Orange-yellow earthy coating
General
CategorySulfide mineral
Formula
(repeating unit)
CdS
Strunz classification2.CB.05a
Crystal systemCubic
Crystal classHextetrahedral (43m)
H-M symbol: (4 3m)
Space groupF43m
Unit cella = 5.818 Å; Z = 4
Structure
Jmol (3D)Interactive image
Identification
ColorBright yellow
Crystal habitPowdery massive
Mohs scale hardness2.5-3
|re|er}}Metallic
StreakLight yellow
DiaphaneityTranslucent to opaque
Specific gravity4.87
References[1][2][3]
Structure of Hawleyite

Hawleyite is a rare sulfide mineral in the sphalerite group, dimorphous and easily confused with greenockite. Chemically, it is cadmium sulfide, and occurs as a bright yellow coating on sphalerite or siderite in vugs, deposited by meteoric water.[3]

It was discovered in 1955 in the Hector-Calumet mine, Keno-Galena Hill area, Yukon Territory and named in honour of mineralogist James Edwin Hawley (1897–1965), a professor at Queen's University in Ontario, Canada .[2][1]

See also

References