Copper selenide

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Copper selenide
Names
IUPAC name
Copper Selenide
Identifiers
3D model (
JSmol
)
ECHA InfoCard
 100.039.799 Edit this at Wikidata
EC Number
  • 243-796-7
UNII
  • InChI=1S/2Cu.Se
    Key: KTLOQXXVQYUCJU-UHFFFAOYSA-N
  • [Cu].[Cu].[Se]
Properties
Cu2Se
Molar mass 206.063 g·mol−1
Appearance Dark blue, black
Density 6.84 g/mL[1]
Hazards
GHS labelling:
GHS06: ToxicGHS08: Health hazardGHS09: Environmental hazard
Danger
H201, H331, H373, H410
P260, P261, P264, P270, P271, P273, P301+P310, P304+P340, P311, P314, P321, P330, P391, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Copper selenide is an

binary compound between copper and selenium
. The chemical formula depends on the ratio between the two elements, such as CuSe or Cu2Se.

The crystalline structure and electronic behavior is determined by its elemental composition.

p-type semiconductor with direct and indirect bandgap energies in the range of 2.1–2.3 eV and 1.2–1.4 eV, respectively.[4] It is frequently grown as nanoparticles or other nanostructures.[5][6][7]

Uses

Copper selenide is produced in-situ to form a protective black coating on iron or steel parts in some cold-bluing processes.[8] Bluing solutions that operate in this manner will typically be labeled as containing selenous acid or selenium dioxide.[9][10] It has also been investigated for use in the treatment of colon cancer.[6]

Natural occurrences

Copper selenides are the most common selenium minerals. CuSe is known in mineralogy as klockmannite,[11] while Cu2Se occurs as two polymorphs, berzelianite[12] (isometric, more common) and bellidoite (tetragonal). There are more natural Cu selenides to date, including umangite, Cu3Se2 and athabascaite, Cu5Se4.[13]

See also

References

  1. ^ "Copper (I) selenide". Sigma-Aldrich. Retrieved 12 April 2016.
  2. S2CID 137099918
    . Retrieved 28 June 2021.
  3. doi:10.1016/j.jpcs.2015.01.018
    .
  4. PMID 30177955
    .
  5. doi:10.1039/c2ce06270d
    .
  6. ^
    PMID 21553924
    .
  7. doi:10.1016/j.jcrysgro.2012.01.026
    .
  8. ^ "Room Temperature Black Oxide". Archived from the original on 28 April 2016. Retrieved 12 April 2016.
  9. ^ "Insta-Blak 333 MSDS" (PDF). Archived from the original (PDF) on 23 April 2016. Retrieved 12 April 2016.
  10. ^ "Oxpho-Blue MSDS" (PDF). Retrieved 12 April 2016.
  11. ^ Berry, L. G. (1954). "The crystal structure of covellite, cuse and klockmannite, cuse". American Mineralogist. 39 (5–6): 504–509.
  12. ^ Harris, D. C.; Cabri, L. J.; Murray, E. J. (1970). "An occurrence of a sulphur-bearing berzelianite" (PDF). The Canadian Mineralogist: 737–740.
  13. ^ Harris, D. C.; Cabri, L. J.; Kaiman, S. (1970). "Athabascaite: A New Copper Selenide Mineral from Martin Lake, Saskatchewan". The Canadian Mineralogist. 10 (2): 207–215.
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