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Hawleyite

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Hawleyite
Orange-yellow earthy coating
General
CategorySulfide mineral
Formula
(repeating unit)
CdS
IMA symbolHwl[1]
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
LusterMetallic
StreakLight yellow
DiaphaneityTranslucent to opaque
Specific gravity4.87
References[2][3][4]
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.[4]

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.[3][2]

See also

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References

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  1. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. ^ a b MinDAT
  3. ^ a b Webmineral
  4. ^ a b Handbook of Mineralogy