Corderoite
A variety of Minerals
What is Corderoite?
Corderoite is an extremely rare mercury sulfide chloride mineral with formula Hg3S2Cl2. It crystallizes in the isometric crystal system. It is soft, 1.5 to 2 on the Mohs scale, and varies in color from light gray to black and rarely pink or yellow. It was first described in 1974 for occurrences in the McDermitt Mercury mine in Humboldt County, Nevada. The name is from the old name of the mine, the Old Cordero Mine.
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Key Characteristics
Composition of Corderoite
Corderoite has crankshaft chains that are crosswise linked by additional Hg²+. The bond distance between the cation Hg and anion S is 2.422 Angstroms. It has two angles, Hg-S-HG= 94.1º and S-Hg-S= 165.1º. Various sulfide halides of Hg share the feature of being face-sharing [HgS2X4] −6 polyhedral, as corderoite's polyhedra X=Cl.
Quick Facts
Physical Properties
- Color
- Light orange-pink
- Hardness (Mohs)
- 3
- Density
- 6.845 g/cm³
Chemical Properties
- Chemical Formula
- Hg2+3S2Cl2
- Elements
- Cl, Hg, S
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