KBr — Properties & Data | MatWorld

KBr

Name: KBr
Brand: MatWorld

ceramic

· KBr

Potassium bromide (KBr) is an ionic halide ceramic compound that forms a face-centered cubic crystal structure. It is primarily used in optical and spectroscopic applications where transparency to infrared radiation is critical, including FTIR spectrometers, thermal imaging windows, and laboratory optics. KBr is valued for its wide infrared transmission range and relative ease of fabrication into precision optical components, though it is hygroscopic and mechanically softer than competing IR-transparent ceramics like sapphire or zinc selenide, making it suitable for laboratory rather than harsh field environments.

infrared optics and windowsFTIR spectroscopythermal imaginglaboratory instrumentsionic crystal research

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Units:

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)3 entries	21.64	GPa	DFT
↳	17.27	GPa	DFT · OptB88vdW
↳	21.64	GPa	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	0.7061	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	Pa	DFT · PBE
Poisson's Ratio(ν)2 entries	0.2800	-	DFT · OptB88vdW
↳	0.3479	-	DFT · PBE
Shear Modulus(G)3 entries	7.327	GPa	DFT
↳	10.90	GPa	DFT · OptB88vdW
↳	7.327	GPa	DFT · PBE

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
Density(ρ)	2.801	kg/m³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)3 entries	7.600	eV	Measured
↳	4.602	eV	DFT · OptB88vdW
↳	7.480	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)2 entries	4.771	-	DFT · OptB88vdW
↳	3.971 range 2.619–5.323median of 2 measurements	-	DFT · PBEsol
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	2.818	-	DFT · OptB88vdW
↳	2.253	-	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.000	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000718	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00131	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-105.1	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	417.1	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	0.000	%	DFT · TBmBJ

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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Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-1.870	eV/atom	DFT · OptB88vdW
↳	-2.041	eV/atom	Measured

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.

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.

KBr

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental