Copper(II) selenide
| Names | |
|---|---|
| IUPAC name
Copper(II) selenide | |
| Other names
Cupric selenide | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.013.885 |
| EC Number |
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties[1] | |
| CuSe | |
| Molar mass | 142.517 g·mol−1 |
| Appearance | Black |
| Density | 5.99 g/cm3 |
| Melting point | 550 °C (1,022 °F; 823 K) (decomposes) |
| Hazards | |
| GHS labelling:[2] | |
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| Danger | |
| H301, H331, H373, H410 | |
| P260, P264, P270, P271, P273, P301+P316, P304+P340, P316, P319, P321, P330, P391, P403+P233, P405, P501 | |
| Related compounds | |
Other anions |
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Other cations |
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Related compounds |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Copper(II) selenide is an inorganic binary compound between copper and selenium, with the chemical formula CuSe.
Properties
[edit]Copper(II) selenide is soluble in hydrochloric acid and sulfuric acid, evolving hydrogen selenide and sulfur dioxide respectively.[1] It is oxidized to copper(II) selenite by nitric acid.[1]
Occurrence
[edit]Copper selenides are the most common selenium minerals. CuSe is known in mineralogy as klockmannite.[3]
Structure
[edit]Copper(II) selenide exhibits polymorphism. α-CuSe (klockmannite) is generally regarded as having a similar structure to CuS (covellite), but the precise structure could not be determined from powder diffraction data.[4] γ-CuSe is stable above 393 K (120 °C; 248 °F) and is also hexagonal with similar unit cell dimensions (a = 3.984 Å, c = 17.288 Å at 430 K (157 °C; 314 °F)).[4] The diffraction pattern is very similar to that of α-CuSe.[4]
Uses
[edit]Copper(II) selenide is produced in situ to form a protective black coating on iron or steel parts in some cold-bluing processes.[5] Bluing solutions that operate in this manner will typically be labeled as containing selenous acid or selenium dioxide.[6][7] It has also been investigated for use in the treatment of colon cancer.[8]
Related compounds
[edit]Other copper selenides have been characterized including Cu1.8Se (non-stoichiometric), Cu3Se2, CuSe2 (low pressure modification), and CuSe2II (high pressure modification).[4] A copper iron selenide (CuFeSe2) has also been characterized.[9]
References
[edit]- 1 2 3 Perry, Dale L. (2016-04-19). Handbook of Inorganic Compounds. CRC Press. p. 151. ISBN 978-1-4398-1462-8.
- ↑ PubChem. "Copper selenide (CuSe)". pubchem.ncbi.nlm.nih.gov. Retrieved 2026-02-21.
- ↑ Berry, L. G. (1954). "The crystal structure of covellite, cuse and klockmannite, cuse". American Mineralogist. 39 (5–6): 504–509.
- 1 2 3 4 Heyding, Robert Donald; Murray, Ritchie MacLaren (1976-03-15). "The crystal structures of Cu1•8Se, Cu3Se2, α- and γCuSe, CuSe2, and CuSe2II". Canadian Journal of Chemistry. 54 (6): 841–848. doi:10.1139/v76-122. ISSN 0008-4042. Retrieved 2026-02-21.
- ↑ "Room Temperature Black Oxide". Archived from the original on 28 April 2016. Retrieved 12 April 2016.
- ↑ "Insta-Blak 333 MSDS" (PDF). Archived from the original (PDF) on 23 April 2016. Retrieved 12 April 2016.
- ↑ "Oxpho-Blue MSDS" (PDF). Retrieved 12 April 2016.
- ↑ Hessel, Colin M.; Pattani, Varun P.; Rasch, Michael; Panthani, Matthew G.; Koo, Bonil; Tunnell, James W.; Korgel, Brian A. (2011-05-10). "Copper Selenide Nanocrystals for Photothermal Therapy". Nano Letters. 11 (6): 2560–2566. Bibcode:2011NanoL..11.2560H. doi:10.1021/nl201400z. PMC 3111000. PMID 21553924.
- ↑ Delgado, J. M.; de Delgado, G. Diaz; Quintero, M.; Woolley, J. C. (1992-03-01). "The crystal structure of copper iron selenide, CuFeSe2". Materials Research Bulletin. 27 (3): 367–373. doi:10.1016/0025-5408(92)90066-9. ISSN 0025-5408.
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