K2ErF5

K2ErF5 is a stable, insulating fluoride compound composed of potassium, erbium, and fluorine.

ErFK
Crystal structure of K2ErF5
Ground-state structure · Materials Project
Overview

About K2ErF5

K2ErF5 is a complex fluoride compound characterized by its wide-band-gap insulating electronic nature. As a thermodynamically stable phase residing on the convex hull, it represents a robust crystalline structure within the broader family of rare-earth alkali metal fluorides.

The compound is primarily of interest for its structural integrity and potential utility in optical materials. Its stability makes it a reliable candidate for research into advanced luminescent materials and specialized solid-state devices where insulating properties are required.

At a glance

Key Properties

Cross-validated computational properties for K2ErF5, aggregated across 3 databases.

Band Gap

6.79 eV
Range across DFT structures

Energy Above Hull

0.000 eV/atom
Best (lowest) across sources

Stability

On hull (stable)
2 DFT sources

Structures

5
3 databases, 1 space group
Uses

Applications

Where K2ErF5 is used.

Optical materialsLuminescent researchSolid-state device development
Reference

Frequently Asked Questions

Common questions about K2ErF5, answered from cross-validated data.

What is K2ErF5?

K2ErF5 is a stable, insulating fluoride compound composed of potassium, erbium, and fluorine.

More questions
What is K2ErF5 used for?
K2ErF5 is used in optical materials, luminescent research, and solid-state device development.
What is the band gap of K2ErF5?
K2ErF5 has a DFT-computed band gap of 6.79 eV across 5 reported structures.
Is K2ErF5 a metal, semiconductor, or insulator?
With a wide band gap up to 6.79 eV it is an insulator / wide-band-gap material.
Is K2ErF5 thermodynamically stable?
Yes — K2ErF5 sits on the convex hull (energy above hull 0 eV/atom), i.e. on hull (stable).
How many polymorphs of K2ErF5 are known?
5 structures of K2ErF5 are reported across 3 databases, spanning 1 distinct space group.
What elements does K2ErF5 contain?
K2ErF5 contains Er, F, and K (3 elements).
Where does the data for K2ErF5 come from?
K2ErF5 data is cross-referenced from latticegraph.
Comparison

How It Compares

As a standalone entry in this context, K2ErF5 serves as a representative example of stable, insulating rare-earth fluoride frameworks, providing a baseline for understanding the structural diversity of alkali-lanthanide systems.

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

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