Rubidium fluoride

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Rubidium fluoride
Rubidium fluoride
Names
IUPAC name
Rubidium fluoride
Other names
Rubidium(I) Fluoride
Identifiers
CAS number 13446-74-7 YesY
ChemSpider 75311 YesY
Jmol-3D images Image
PubChem 83473
RTECS number VL8740000
Properties
RbF
Molar mass 104.4662 g/mol
Appearance white crystalline solid
Density 3.557 g/cm3
Melting point 795 °C (1,463 °F; 1,068 K)
Boiling point 1,408 °C (2,566 °F; 1,681 K)
130.6 g/100 mL (18 °C)
Hazards
Main hazards Toxic
EU Index Not listed
Flash point Non-flammable
Related compounds
Other anions
Rubidium chloride
Rubidium bromide
Rubidium iodide
Other cations
Lithium fluoride
Sodium fluoride
Potassium fluoride
Caesium fluoride
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 YesY verify (what isYesY/N?)
Infobox references

Rubidium fluoride (RbF) is the fluoride salt of rubidium. It is a cubic crystal with rock-salt structure.

There are several methods for synthesising rubidium fluoride. One involves reacting rubidium hydroxide with hydrofluoric acid:

RbOH + HF → RbF + H2O

Another method is to neutralize rubidium carbonate with hydrofluoric acid:

Rb2CO3 + 2HF → 2RbF + H2O + CO2

Another possible method is to react rubidium hydroxide with ammonium fluoride:

RbOH + NH4F → RbF + H2O + NH3

The least used method due to expense of rubidium metal is to react it directly with fluorine gas, as rubidium reacts violently with halogens:

2Rb + F2 → 2RbF

References[edit]