Rubidium fluoride

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Rubidium fluoride
Names
Other names
Rubidium(I) Fluoride
Identifiers
3D model (Jmol)
ChemSpider
ECHA InfoCard 100.033.262
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)
−31.9·10−6 cm3/mol
Hazards
Main hazards Toxic
Flash point Non-flammable
Related compounds
Other anions
Rubidium chloride
Rubidium bromide
Rubidium iodide
Rubidium astatide
Other cations
Lithium fluoride
Sodium fluoride
Potassium fluoride
Caesium fluoride
Francium fluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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]