- Copper(I) sulfide
Copper(I) sulfide Identifiers CAS number PubChem ChemSpider ChEBI RTECS number GL8910000 Jmol-3D images Image 1 Properties Molecular formula Cu2S Molar mass 159.16 g/mol Density 5.6 g/cm3  Melting point
Solubility in water Insoluble Solubility slightly soluble in HCl; soluble in NH4OH; dissolves in KCN; decomposes in HNO3, H2SO4 Hazards EU Index Not listed Flash point Non-flammable Related compounds Other anions Copper(I) oxide
Other cations Nickel(II) sulfide
(what is: /?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Copper(I) sulfide is a copper sulfide, a chemical compound of copper and sulfur. It has the chemical compound Cu2S. It is found in nature as the mineral chalcocite. It has a narrow range of stoichiometry ranging from Cu1.997S to Cu2.000S.
Preparation and Reactions
Cu2S can be prepared by heating copper strongly in sulfur vapour or H2S. The reaction of copper powder in molten sulfur rapidly produces Cu2S, whereas pellets of copper require much higher temperature Cu2S reacts with oxygen to form SO2:
- 2Cu2S + 3O2 → 2Cu2O + 2SO2
In the production of copper two thirds of the molten copper sulfide is oxidised as above, and the Cu2O reacts with unoxidised Cu2S to give Cu metal:
- Cu2S + 2Cu2O → 6Cu + SO2
There are two forms of Cu2S a low temperature monoclinic form ("low-chalcocite") which has a complex structure with 96 copper atoms in the unit cell and a hexagonal form stable above 104°C. In this structure there are 24 crystallographically distinct Cu atoms and the structure has been described as approximating to a hexagonal close packed array of sulfur atoms with Cu atoms in planar 3 coordination. This structure was initially assigned an orthorhombic cell due to the twinning of the sample crystal.
There is also a crystallographically-distinct phase (the mineral djurleite) with stoichiometry Cu1.96S which is non-stoichiometric (range Cu1.934S-Cu1.965S) and has a monoclinic structure with 248 copper and 128 sulfur atoms in the unit cell . Cu2S and Cu1.96S are similar in appearance and hard to distinguish one from another.
- copper sulfide for an overview of all copper sulfide phases
- copper monosulfide, CuS
- ^ Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0070494398
- ^ a b Greenwood, Norman N.; Earnshaw, A. (1984). Chemistry of the Elements. Oxford: Pergamon. p. 1373. ISBN 0-08-022057-6.
- ^ An electrochemical investigation of the system copper-sulfur, R. W. Potter, Economic Geology; 1977; 72;. 8; 1524-1542
- ^ The formation of Cu2S from the elements I. Copper used in form of powders, Blachnik R., Müller A., Thermochimica Acta, 361, 1-2, (2000), 31-52, doi:10.1016/S0040-6031(00)00545-1
- ^ a b Egon Wiberg, Arnold Frederick Holleman (2001) Inorganic Chemistry, Elsevier ISBN 0123526515
- ^ a b H. T. Evans "Djurleite (Cu1.94S) and Low Chalcocite (Cu2S): New Crystal Structure Studies" Science 203 (1979) 356
- ^ Wells A.F. (1984) Structural Inorganic Chemistry 5th edition Oxford Science Publications ISBN 0-19-855370-6
- ^ Copper coordination in low chalcocite and djurleite and other copper-rich sulfides, Evans H.T., American Mineralogist; August 1981, 66, 7-8, 807-818
Wikimedia Foundation. 2010.
Look at other dictionaries:
copper(I) sulfide — vario(I) sulfidas statusas T sritis chemija formulė Cu₂S atitikmenys: angl. copper(I) sulfide rus. меди(I) сульфид; медь полусернистая; медь сернистая закисная ryšiai: sinonimas – divario sulfidas … Chemijos terminų aiškinamasis žodynas
copper(II) sulfide — vario(II) sulfidas statusas T sritis chemija formulė CuS atitikmenys: angl. copper(II) sulfide rus. меди(II) сульфид; медь сернистая … Chemijos terminų aiškinamasis žodynas
Copper monosulfide — IUPAC name Copper sulfide … Wikipedia
Copper sulfide — Copper sulfides describe a family of chemical compounds and minerals with the formula CuxSy. Both minerals and synthetic materials comprise these compounds. Some copper sulfides are economically important ores. Prominent copper sulfide minerals… … Wikipedia
Copper(I) oxide — Copper(I) oxide … Wikipedia
Copper(II) oxide — IUPAC name Copper(II) oxide … Wikipedia
Copper — For other uses, see Copper (disambiguation) … Wikipedia
copper processing — Introduction use of smelting or leaching, usually followed by electrolytic refining or recovery, to turn the ore into a form from which products can be fashioned. Included in this article also is a discussion of the mining of copper and of its… … Universalium
Copper Mine, Virgin Gorda — The ruins at Copper Mine point, Virgin Gorda The Copper Mine on Virgin Gorda, British Virgin Islands is a National Park containing the ruins of an abandoned 19th century copper mine. Copper was first discovered on Virgin Gorda. Local legends also … Wikipedia
copper pyrites — chalcopyrite (copper iron sulfide) … Eponyms, nicknames, and geographical games