Gallium(II) selenide
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Gallium(II) selenide (GaSe) is a chemical compound. It has a hexagonal layer structure, similar to that of GaS.[1] It is a photoconductor,[2] a second harmonic generation crystal in nonlinear optics,[3] and has been used as a far-infrared conversion material[4] at 14–31 THz and above.[5]
Quick Facts Names, Identifiers ...
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Names | |
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IUPAC name
Gallium selenide | |
Other names
Gallium monoselenide | |
Identifiers | |
3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.031.523 ![]() |
PubChem CID |
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Properties | |
GaSe | |
Molar mass | 148.69 g/mol |
Appearance | brown solid |
Density | 5.03 g/cm3 |
Melting point | 960 °C (1,760 °F; 1,230 K) |
Band gap | 2.1 eV (indirect) |
Refractive index (nD) |
2.6 |
Structure | |
hexagonal, hP8 | |
P63/mmc, No. 194 | |
Related compounds | |
Other anions |
Gallium(II) oxide, Gallium(II) sulfide, Gallium(II) telluride |
Other cations |
Zinc(II) selenide, Germanium monoselenide, Indium monoselenide |
Related compounds |
Gallium(III) selenide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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