Rubidium bromide

Rubidium bromide
IUPAC name Rubidium bromide
Other names Rubidium(I) bromide
Identifiers
CAS number	7789-39-1 Y
PubChem	4670918
ChemSpider	74217 Y
Jmol-3D images	{{#if:[Rb+].[Br-]|Image 1
SMILES [Rb+].[Br-]
InChI InChI=1S/BrH.Rb/h1H;/q;+1/p-1 Y Key: JAAGVIUFBAHDMA-UHFFFAOYSA-M Y InChI=1/BrH.Rb/h1H;/q;+1/p-1 Key: JAAGVIUFBAHDMA-REWHXWOFAB
Properties
Molecular formula	RbBr
Molar mass	165.372 g/mol
Appearance	white crystalline solid
Density	3.350 g/cm3
Melting point	693 °C; 1,279 °F; 966 K
Boiling point	1,340 °C; 2,440 °F; 1,610 K
Solubility in water	98 g/100 mL
Hazards
EU Index	Not listed
Flash point	Non-flammable
Related compounds
Other anions	Rubidium fluoride Rubidium chloride Rubidium iodide
Other cations	Lithium bromide Sodium bromide Potassium bromide Caesium bromide
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Rubidium bromide is the bromide of rubidium. 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 + 2HBr → 2RbBr + 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

• WebElements. URL accessed March 1, 2006.