Na2LiBe2F7

ceramic

· JVASP-21770· Na2LiBe2F7

Na2LiBe2F7 is a fluoride-based ceramic compound combining sodium, lithium, beryllium, and fluorine—belonging to the family of mixed-metal fluorides used primarily in optical and electrochemical applications. This material is researched for use in solid-state electrolytes for high-energy-density batteries and as a transparent optical window material in specialized instrumentation. Its fluoride composition makes it notable for chemical stability and low refractive index properties that differentiate it from traditional oxide ceramics, though it remains primarily in research and development rather than high-volume production.

solid-state battery electrolytesoptical windows and lensesthermal management in electronicsresearch fluoride ceramicsspecialty instrumentation components

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	6,006	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.3200	-	DFT · OptB88vdW
Shear Modulus(G)	2,603.4	ksi	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.08768	lb/in³	DFT · OptB88vdW

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

Filter by

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	7.313	eV	DFT · OptB88vdW
Dielectric Constant (Relative Permittivity)(εr)	7.088	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	1.809	-	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.02275	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000881	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000441	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-141	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	443.3	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)	-3.260	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.

Na2LiBe2F7 — Properties & Data | MatWorld

Na2LiBe2F7

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental