Rubidium bromide
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| Template:Longitem | RbBr |
| Molar mass | 165.372 g/mol |
| Appearance | white crystalline solid |
| Density | 3.350 g/cm3 |
| Melting point | Template:Chembox CalcTemperatures |
| Boiling point | Template:Chembox CalcTemperatures |
| Template:Longitem | −56.4·10−6 cm3/mol |
| Flash point | Template:Chembox CalcTemperatures |
| Template:Longitem | Rubidium fluoride Rubidium chloride Rubidium iodide Rubidium astatide |
| Template:Longitem | Lithium bromide Sodium bromide Potassium bromide Caesium bromide Francium bromide |
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Rubidium bromide is an inorganic compound with the chemical formula Template:Chem2. It is a salt of hydrogen bromide. It consists of bromide anions Template:Chem2 and rubidium cations Template:Chem2. It has a NaCl crystal structure, with a lattice constant of 685 picometres.[1]
There are several methods for synthesising rubidium bromide. One involves reacting rubidium hydroxide with hydrobromic acid:
- RbOH + HBr → RbBr + H2O
Another method is to neutralize rubidium carbonate with hydrobromic acid:
- Rb2CO3 + 2 HBr → 2 RbBr + H2O + CO2
Rubidium metal would react directly with bromine to form RbBr, but this is not a sensible production method, since rubidium metal is substantially more expensive than the carbonate or hydroxide; moreover, the reaction would be explosive.
References
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- WebElements. URL accessed March 1, 2006.
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