Rb2HfF6 — Properties & Data | MatWorld

Rb2HfF6

ceramic

· Rb2HfF6

Rb2HfF6 is an inorganic ceramic compound belonging to the elpasolite family of fluoride ceramics, composed of rubidium, hafnium, and fluorine. This material is primarily of research interest rather than established industrial production, studied for its potential in fluoride-based optical, thermal, and structural applications due to hafnium's high refractory character and the chemical stability of the fluoride framework. Engineers may consider this material class for specialized applications requiring corrosion resistance, thermal stability, or optical transparency in aggressive chemical or thermal environments where conventional ceramics degrade.

optical coatings and windowshigh-temperature thermal barrierscorrosion-resistant chemical equipmentnuclear fuel matrix materialsadvanced ceramics researchfluoride-based scintillators

Compliance & Regulations

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

Units:

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)2 entries	21.89	GPa	DFT
↳	30.07	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2700	-	DFT · OptB88vdW
Shear Modulus(G)2 entries	10.26	GPa	DFT
↳	16.30	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.

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

Property	Value	Unit	Conditions	Source
Density(ρ)	4.995	kg/m³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	7.528	eV	DFT · OptB88vdW
Dielectric Constant (Relative Permittivity)(εr)3 entries	7.043	-	DFT · OptB88vdW
↳	9.510	-	DFT · PBE
↳	5.768 range 2.207–9.330median of 2 measurements	-	DFT · PBEsol
High-Frequency Dielectric Constant (ε∞)(ε∞)	2.344	-	DFT · OptB88vdW
Electronic Dielectric Tensor(ε∞)	Matrix (redacted)	-	DFT · PBE
Total Dielectric Tensor(ε)	Matrix (redacted)	-	DFT · PBE
Piezoelectric Modulus(eij)	0.000	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000663	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000271	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-264.6	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	524.2	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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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-3.643	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.

Rb2HfF6

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental