KCl — Properties & Data | MatWorld

KCl

Name: KCl
Brand: MatWorld

ceramic

· KCl

Potassium chloride (KCl) is an ionic ceramic compound belonging to the halide family, characterized by a rock-salt crystal structure that provides moderate mechanical stiffness and brittle behavior typical of ionic crystals. It is widely used in optical and infrared applications due to its transparency across broad wavelength ranges, as well as in thermal and chemical contexts where its ionic nature and stability at moderate temperatures are advantageous. KCl is also employed in laboratory and industrial settings for specialized purposes including electrolysis, thermal insulation windows, and research applications where its well-understood mechanical and optical properties make it a reliable choice compared to more complex oxide ceramics.

infrared optics and windowsthermal analysis detectorselectrolyte and ionic applicationslaboratory instrumentationsalt-based thermal storagetransparent ceramic alternatives

Compliance & Regulations

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Units:

si imperial

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)3 entries	2,295.3	ksi	DFT
↳	3,520.1	ksi	DFT · OptB88vdW
↳	2,295.3	ksi	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	0.8015	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	ksi	DFT · PBE
Poisson's Ratio(ν)2 entries	0.2600	-	DFT · OptB88vdW
↳	0.2556	-	DFT · PBE
Shear Modulus(G)3 entries	1,340.3	ksi	DFT
↳	2,181.4	ksi	DFT · OptB88vdW
↳	1,340.3	ksi	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)	0.08465	lb/in³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)3 entries	8.500	eV	Measured
↳	5.326	eV	DFT · OptB88vdW
↳	8.409	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)2 entries	6.943	-	DFT · OptB88vdW
↳	3.823 range 2.385–5.260median of 2 measurements	-	DFT · PBEsol
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	2.588	-	DFT · OptB88vdW
↳	2.100	-	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	0.000850	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00124	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-122.2	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	450.6	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)	0.03570	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-2.053	eV/atom	DFT · OptB88vdW
↳	-2.263	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.

KCl

Mechanical Properties

Physical Properties

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Regulatory Screening

Environmental