Rubidium fluoride

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General
Systematic name Rubidium fluoride
Other names Rubidium(I) Fluoride
Molecular formula RbFl
Molar mass 104.466 g/mol
Appearance white crystalline solid
CAS number [13446-74-7]
Properties
Density and phase 3200 kg m-3 when solid
Melting point 795°C / 1068K
Related compounds
Other anions Rubidium fluoride
Rubidium chloride
Rubidium bromide
Rubidium iodide
Rubidium hydride
Rubidium hydroxide
Rubidium oxide
Rubidium sulfide
Rubidium selenide
Rubidium telluride
Other cations Lithium fluoride
Sodium fluoride
Potassium fluoride
Caesium fluoride
Francium fluoride
and all other fluorides
Except where noted otherwise, data are given for
materials in their standard state (at 25 °C, 100 kPa)
Infobox disclaimer and references

Rubidium fluoride (RbF) is the fluoride of rubidium. It is an octahedral crystal.

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

RbOH + HF → RbF + H2O

Another method is to neutralise rubidium carbonate with hydrofluoric acid:

Rb2(CO3) + 2HF → 2RbF + H2O + CO2

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

2Rb + F2 → 2RbF

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