Rubidium selenide
Chemical compound
From Wikipedia, the free encyclopedia
Rubidium selenide is an inorganic compound composed of selenium and rubidium. It is a selenide with a chemical formula of Rb2Se.
Rb+: __ Se2-: __ | |
| Names | |
|---|---|
| IUPAC name
Rubidium selenide | |
| Identifiers | |
3D model (JSmol) |
|
| ChemSpider | |
| ECHA InfoCard | 100.045.847 |
| EC Number |
|
PubChem CID |
|
CompTox Dashboard (EPA) |
|
| |
| |
| Properties | |
| Rb2Se | |
| Molar mass | 249.907 g·mol−1 |
| Appearance | colourless, highly hygroscopic crystals[1] |
| Density | 2.912 g/cm3[2] 3.16 g/cm3[3] |
| Melting point | 733 °C[2] |
| hydrolyses[4] | |
| Solubility in other solvents | soluble in ethanol and glycerin |
| Structure | |
| cubic: antifluorite structure | |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards |
toxic |
| GHS labelling: | |
   | |
| H301, H331, H373, H410 | |
| Related compounds | |
Other anions |
|
Other cations |
|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Structure
Rubidium selenide has cubic crystal structure, which belongs to the antifluorite structure, and the space group is and the lattice parameters are a=801.0 pm, per unit. The unit cell has 4 units.[1]
Preparation
Rubidium selenide can be prepared by reacting mercury selenide and metallic rubidium.[5] The elements can be synthesized in liquid ammonia.[6]
Hydrogen selenide can also be dissolved in an aqueous solution of rubidium hydroxide to eventually form rubidium selenide.[7] This method is similar to the method for preparing rubidium sulfide, because they are both chalcogenide compounds.
- RbOH + H2Se → RbHSe + H2O
- RbHSe + RbOH → Rb2Se + H2O
Use
Rubidium selenide is used together with caesium selenide in photovoltaic cells.[8]