Hawleyite
| Hawleyite | |
|---|---|
Orange-yellow earthy coating | |
| General | |
| Category | Sulfide mineral |
| Formula | CdS |
| IMA symbol | Hwl |
| 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 |
| Structure | |
| Jmol (3D) | Interactive image |
| 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 | |
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.
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.