K2AlF5 — Properties & Data | MatWorld

K2AlF5

metal

· K2AlF5

K2AlF5 is an inorganic fluoroaluminate compound with a complex ionic crystal structure, classified here as a metal-containing ceramic rather than a traditional metallic alloy. This material belongs to the potassium aluminum fluoride family and is primarily encountered in industrial chemistry and materials research contexts, particularly as a raw material or intermediate in aluminum processing, glass manufacturing, and specialized flux applications where fluorine-containing compounds are needed to lower melting points or improve workability of molten metals and ceramics. Engineers would select K2AlF5 specifically for high-temperature applications requiring chemical stability in fluorine-rich environments and as a processing aid in metallurgical operations, though it remains less common than related compounds like cryolite (Na3AlF6) in conventional manufacturing.

aluminum smelting fluxglass and ceramic processinghigh-temperature chemical stabilitymetallurgical additivesmaterials research compoundsindustrial chemistry applications

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

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)2 entries	26.18	GPa	DFT
↳	34.93	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2600	-	DFT · OptB88vdW
Shear Modulus(G)2 entries	14.45	GPa	DFT
↳	20.94	GPa	DFT · OptB88vdW

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)	2.573	kg/m³	DFT · OptB88vdW

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Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	6.616	eV	DFT · OptB88vdW
↳	11.42	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)	3.960 range 1.869–6.051median of 2 measurements	-	DFT · PBEsol
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	1.920	-	DFT · OptB88vdW
↳	1.612	-	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000929	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000436	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-153.1	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	437.5	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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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-3.438	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

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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.

K2AlF5

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