Na3AlF6 — Properties & Data | MatWorld

Na3AlF6

Name: Na3AlF6
Brand: MatWorld

metal

· Na3AlF6

Sodium aluminum fluoride (cryolite), Na₃AlF₆, is an ionic crystalline compound and a key industrial chemical rather than a structural metal alloy, despite its classification here. It is primarily valued as a flux and electrolyte in aluminum smelting, where it lowers the melting point of alumina and enables efficient Hall-Héroult cell operation at reduced temperatures. Engineers select cryolite for high-temperature electrochemistry and metallurgical processing because of its thermal stability, low density, and ability to dissolve alumina while maintaining electrical conductivity.

aluminum smelting and refiningelectrolytic cell fluxhigh-temperature chemistryindustrial metallurgyrefractory applications

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	7,595.6	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.3100	-	DFT · OptB88vdW
Shear Modulus(G)	2,436.6	ksi	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1003	lb/in³	DFT · OptB88vdW

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

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Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	7.199	eV	DFT · OptB88vdW
Dielectric Constant (Relative Permittivity)(εr)	11.56	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	1.871	-	DFT · OptB88vdW
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.000	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00129	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.0000843	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-167.9	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	534.6	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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Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.07060	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-3.260	eV/atom	DFT · OptB88vdW
↳	-3.409	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

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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.

Na3AlF6

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