Copper monosulfide
Copper monosulfide is a chemical compound of copper and sulfur. It was initially thought to occur in nature as the dark indigo blue mineral covellite. However, it was later shown to be rather a cuprous compound, formula Cu+3S(S2). CuS is a moderate conductor of electricity. A black colloidal precipitate of CuS is formed when hydrogen sulfide, H2S, is bubbled through solutions of Cu(II) salts. It is one of a number of binary compounds of copper and sulfur (see copper sulfide for an overview of this subject), and has attracted interest because of its potential uses in catalysis and photovoltaics.
| Names | |
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| IUPAC name
Copper sulfide | |
| Other names | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.013.884 |
| EC Number |
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| CuS | |
| Molar mass | 95.611 g/mol |
| Appearance | black powder or lumps |
| Density | 4.76 g/cm3 |
| Melting point | above 500 °C (932 °F; 773 K) (decomposes) |
| 0.000033 g/100 ml (18 °C) | |
Solubility product (Ksp) |
6 x 10−37 |
| Solubility | soluble in HNO3, NH4OH, KCN insoluble in HCl, H2SO4 |
| -2.0·10−6 cm3/mol | |
Refractive index (nD) |
1.45 |
| Structure | |
| hexagonal | |
| Hazards | |
| GHS labelling: | |
| H413 | |
| P273, P501 | |
| NIOSH (US health exposure limits): | |
PEL (Permissible) |
TWA 1 mg/m3 (as Cu) |
REL (Recommended) |
TWA 1 mg/m3 (as Cu) |
IDLH (Immediate danger) |
TWA 100 mg/m3 (as Cu) |
| Related compounds | |
Other anions |
Copper(II) oxide |
Other cations |
zinc sulfide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
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