Na2B2Se7 — Properties & Data | MatWorld

Na2B2Se7

ceramic

· JVASP-12835· Na2B2Se7

Na₂B₂Se₇ is an inorganic ceramic compound composed of sodium, boron, and selenium, belonging to the borate-selenide family of materials. This compound is primarily investigated in research contexts for infrared optics and photonic applications, where selenium-containing borates offer potential advantages in transparency across extended infrared wavelengths and nonlinear optical properties compared to conventional silicate-based ceramics. The material represents an exploratory formulation rather than an established commercial product, with current development focused on understanding its optical, structural, and thermal behavior for next-generation optical systems.

infrared opticsnonlinear optical devicesphotonic windowsresearch materialsoptical coatingsspectroscopy instrumentation

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1430	lb/in³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	1.486	eV	DFT · OptB88vdW
↳	2.680	eV	DFT · TBmBJ
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	7.374	-	DFT · OptB88vdW
↳	4.045	-	DFT · TBmBJ
Electron Effective Mass(m*e)	2.173	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	2.803	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00277	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000833	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-231.2	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	289	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	9.220	%	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)	-0.4239	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.

Na2B2Se7

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental