Hawleyite
Hawleyite | |
---|---|
Orange-yellow earthy coating | |
General | |
Category | Sulfide mineral |
Formula (repeating unit) | CdS |
Strunz classification | 2.CB.05a |
Crystal system | Cubic |
Crystal class |
Hextetrahedral (43m) H-M symbol: (4 3m) |
Space group | F43m |
Unit cell | a = 5.818 Å; Z = 4 |
Identification | |
Color | Bright yellow |
Crystal habit | Powdery massive |
Mohs scale hardness | 2.5-3 |
Luster | Metallic |
Streak | Light yellow |
Diaphaneity | Translucent to opaque |
Specific gravity | 4.87 |
References | [1][2][3] |
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.[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
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