Na3HfF7 — Properties & Data | MatWorld

Na3HfF7

ceramic

· Na3HfF7

Na3HfF7 is a hafnium-based fluoride ceramic compound combining sodium, hafnium, and fluorine elements. This material belongs to the family of rare-earth and refractory fluoride ceramics, primarily of research and specialized industrial interest rather than commodity use. Applications focus on high-temperature environments, optical systems, and specialty chemical contexts where hafnium's refractory properties and fluoride's thermal stability are leveraged; it represents an alternative to more common fluoride ceramics where hafnium's superior thermal and chemical resistance justifies the cost and material complexity.

high-temperature ceramicsrefractory materialsoptical coatings and windowsfluoride glass precursorsspecialized catalystsresearch compounds

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	4.160	kg/m³	DFT · OptB88vdW

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

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	6.418	eV	DFT · OptB88vdW
↳	9.263	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)2 entries	13.10	-	DFT · OptB88vdW
↳	5.319 range 2.013–8.626median of 2 measurements	-	DFT · PBEsol
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	2.097	-	DFT · OptB88vdW
↳	1.709	-	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.07925	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000572	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000360	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-107.3	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	410.1	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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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.01980	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-3.456	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.

Na3HfF7

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental