Be4TeO7 — Properties & Data | MatWorld

Be4TeO7

ceramic

· Be4TeO7

Be₄TeO₇ is an advanced oxide ceramic compound combining beryllium and tellurium oxides, representing a specialized material within the family of complex metal tellurites. While primarily a research compound rather than a high-volume industrial material, beryllium tellurate ceramics are investigated for applications requiring combinations of thermal stability, optical transparency, and structural rigidity in demanding environments. This material family shows particular promise in specialized optics, high-temperature applications, and advanced sensor systems where conventional ceramics face limitations.

optical windows and lenseshigh-temperature structural ceramicsspecialty optics researchadvanced thermal managementradiation-resistant componentsresearch and development

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	188.0	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2500	-	DFT · OptB88vdW
Shear Modulus(G)	116.7	GPa	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	4.087	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	1.467	eV	DFT · OptB88vdW
↳	2.634	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)2 entries	7.487	-	DFT · OptB88vdW
↳	5.495 range 3.468–7.522median of 2 measurements	-	DFT · PBEsol
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	3.477	-	DFT · OptB88vdW
↳	2.817	-	DFT · TBmBJ
Electron Effective Mass(m*e)	0.3500	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	2.870	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)2 entries	0.3821	C/m²	DFT · OptB88vdW
↳	0.03639	C/m²	DFT · PBE
Piezoelectric Stress Tensor(eij)	Matrix (redacted)	C/m²	DFT · PBE
Thermoelectric Power Factor(PF)2 entries	0.000625	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00142	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-93.62	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	424.6	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	10.06	%	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)	-2.366	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.

Be4TeO7

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental