K2BeF4 — Properties & Data | MatWorld

K2BeF4

ceramic

· JVASP-21551· K2BeF4

K2BeF4 is an inorganic fluoride ceramic compound combining potassium, beryllium, and fluorine elements. This material belongs to the family of complex fluoride ceramics, which are primarily investigated for specialized optical and thermal applications where conventional oxides are unsuitable. K2BeF4 is notable in research contexts for potential use in high-energy laser systems and UV-transparent optical windows, where its fluoride chemistry offers lower refractive index and extended transparency into the ultraviolet spectrum compared to oxide ceramics.

optical windows and UV transparencylaser host materialsthermal-shock resistant refractoriesfluoride crystal researchspecialized high-energy applicationslaboratory and experimental systems

Compliance & Regulations

?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	5,227.2	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2800	-	DFT · OptB88vdW
Shear Modulus(G)	2,792	ksi	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Density(ρ)	0.09592	lb/in³	DFT · OptB88vdW

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Filter by

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	7.491	eV	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	2.026	-	DFT · OptB88vdW
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000788	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000164	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-115.2	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	462.5	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-3.283	eV/atom	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data

Regulatory Screening

Environmental

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.

K2BeF4

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental