Erbium(III) selenide
Chemical compound
From Wikipedia, the free encyclopedia
Erbium(III) selenide is an inorganic compound with a chemical formula of Er2Se3.
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3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.031.494 |
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| Properties | |
| Er2Se3 | |
| Molar mass | 571.431 g·mol−1 |
| Appearance | green-brown[1] or yellow crystals[2] |
| Density | 6.83 g·cm−3[1] 6.855 g·cm−3[2] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation
Erbium(III) selenide can be obtained by the reaction of erbium and selenium:
- 2 Er + 3 Se → Er2Se3
It can also be prepared by reacting erbium oxide and hydrogen selenide at high temperature.[3]
- Er2O3 + 3 H2Se → Er2Se3 + 3 H2O
Properties
Erbium(III) selenide is an orthorhombic crystal with a Sc2S3 structure and a space group of Fddd.[2] It reacts with magnesium selenide at 1000 °C to obtain MgEr2Se4.[4]