KF

Potassium fluoride · Potassium monofluoride

Potassium fluoride is a stable, insulating salt widely used as a source of fluoride ions in industrial and laboratory chemical applications.

FK
Crystal structure of KF
Ground-state structure · Materials Project
Overview

About Potassium fluoride

Potassium fluoride is a thermodynamically stable inorganic salt that functions as a wide-band-gap insulator. Its robust structural integrity is evidenced by its prevalence in materials research, where it serves as a fundamental building block for various chemical processes.

Due to its high stability and unique reactivity, this compound is widely employed in industrial applications ranging from organic synthesis to the manufacturing of specialized glass and metal fluxes. It remains a critical reagent in laboratories requiring reliable fluoride ion sources.

At a glance

Key Properties

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

Band Gap

5.95–6.27 eV
Range across DFT structures

Energy Above Hull

0.000 eV/atom
Best (lowest) across sources

Stability

On hull (stable)
2 DFT sources

Structures

86
4 databases, 18 space groups
Synthesis

Synthesis Routes

Literature-extracted synthesis procedures targeting KF.

Sol Gel
Procedure available · ceder_sol_gel
Solid State
Procedure available · ceder_solid_state
Solid State
Procedure available · ceder_solid_state
Uses

Applications

Where Potassium fluoride is used.

Chemical synthesisGlass etchingFluxing agent in metallurgyFluoridating agent
Reference

Frequently Asked Questions

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

What is KF?

Potassium fluoride is a stable, insulating salt widely used as a source of fluoride ions in industrial and laboratory chemical applications.

More questions
What is KF used for?
Potassium fluoride (KF) is used in chemical synthesis, glass etching, fluxing agent in metallurgy, and fluoridating agent.
What is the band gap of KF?
Potassium fluoride (KF) has a DFT-computed band gap of 5.95–6.27 eV across 86 reported structures.
Is KF a metal, semiconductor, or insulator?
With a wide band gap up to 6.27 eV it is an insulator / wide-band-gap material.
Is KF thermodynamically stable?
Yes — Potassium fluoride (KF) sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
How many polymorphs of KF are known?
86 structures of KF are reported across 4 databases, spanning 18 distinct space groups.
How is KF synthesized?
Literature-reported routes for KF include sol gel, solid state (3 procedures documented).
What elements does KF contain?
Potassium fluoride (KF) contains F and K (2 elements).
Where does the data for KF come from?
KF data is cross-referenced from latticegraph.
Comparison

How It Compares

As a highly stable and well-documented halide, this compound serves as a baseline reference for alkali metal fluorides, representing a standard in ionic crystal behavior and thermodynamic reliability within its chemical family.

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

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