CsF

Cesium fluoride · Caesium fluoride

Cesium fluoride is a stable, insulating salt widely used as a source of fluoride ions in organic chemical synthesis.

CsF
Crystal structure of CsF
Ground-state structure · Materials Project
Overview

About Cesium fluoride

Cesium fluoride is a thermodynamically stable inorganic salt characterized by its wide-gap insulating electronic nature. As a highly ionic compound, it is valued for its ability to provide reactive fluoride ions in anhydrous environments, making it a staple reagent in chemical laboratories.

Due to its high structural versatility, this compound has been extensively documented across numerous experimental and computational databases. Its stability and chemical behavior make it an essential component for specialized synthetic applications where precise ionic control is required.

At a glance

Key Properties

Cross-validated computational properties for Cesium fluoride, aggregated across 4 databases.

Band Gap

5.26–5.94 eV
Range across DFT structures

Energy Above Hull

0.000 eV/atom
Best (lowest) across sources

Stability

On hull (stable)
2 DFT sources

Structures

121
4 databases, 25 space groups
Validation

Cross-Source DFT Agreement

How well independent DFT databases agree on the thermodynamics of CsF. Tight agreement means computed properties can be trusted without re-running calculations.

Agreement Score

1.00 / 1.00
Trust tier: medium

Hull Spread

0.000 eV
EAH spread across sources

Sources Compared

2
materials_project, nomad

Space Group Consensus

All match
Synthesis

Synthesis Routes

Literature-extracted synthesis procedures targeting CsF.

Solid State
Procedure available · ceder_solid_state
Uses

Applications

Where Cesium fluoride is used.

Organic synthesisFluorinating agentBase in condensation reactionsDesilylation reagent
Reference

Frequently Asked Questions

Common questions about Cesium fluoride, answered from cross-validated data.

What is CsF?

Cesium fluoride is a stable, insulating salt widely used as a source of fluoride ions in organic chemical synthesis.

More questions
What is CsF used for?
Cesium fluoride (CsF) is used in organic synthesis, fluorinating agent, base in condensation reactions, and desilylation reagent.
What is the band gap of CsF?
Cesium fluoride (CsF) has a DFT-computed band gap of 5.26–5.94 eV across 121 reported structures.
Is CsF a metal, semiconductor, or insulator?
With a wide band gap up to 5.94 eV it is an insulator / wide-band-gap material.
Is CsF thermodynamically stable?
Yes — Cesium fluoride (CsF) sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
How many polymorphs of CsF are known?
121 structures of CsF are reported across 4 databases, spanning 25 distinct space groups.
How is CsF synthesized?
Literature-reported routes for CsF include solid state.
What elements does CsF contain?
Cesium fluoride (CsF) contains Cs and F (2 elements).
Where does the data for CsF come from?
CsF data is cross-referenced from latticegraph.
Comparison

How It Compares

As a prominent fluoride salt, this compound serves as a benchmark for ionic stability within its class. It is frequently utilized in organic synthesis for its unique solubility and reactivity profile, which distinguishes it from other alkali metal halides that may lack the same degree of chemical versatility in non-aqueous media.

Data sources & attribution
  • latticegraph — Lattice Graph Materials Intelligence Platform

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