Tb3CuGeS7 — Properties & Data | MatWorld

Tb3CuGeS7

metal

· JVASP-25653· Tb3CuGeS7

Tb3CuGeS7 is a ternary intermetallic sulfide compound combining terbium (a rare earth element), copper, germanium, and sulfur in a fixed stoichiometric ratio. This is a research-phase material rather than a commercial engineering alloy; compounds in this family are investigated primarily for their potential thermoelectric, magnetic, and semiconductor properties arising from the rare earth and transition metal constituents. The material represents exploratory work in functional intermetallics where the specific combination of elements may offer unique electronic transport or thermal properties not easily achieved in conventional alloys or ceramics.

thermoelectric device researchrare earth intermetallic compoundsmagnetic material studiessolid-state physics researchsemiconductor compound development

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	72.79	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2900	-	DFT · OptB88vdW
Shear Modulus(G)	37.23	GPa	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	5.656	kg/m³	DFT · OptB88vdW

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

Filter by

Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	1.737	eV	DFT · OptB88vdW
↳	2.386	eV	DFT · TBmBJ
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	8.554	-	DFT · OptB88vdW
↳	6.899	-	DFT · TBmBJ
Electron Effective Mass(m*e)	0.7100	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	1.437	me	DFT · OptB88vdW · 27°C
Thermoelectric Power Factor(PF)2 entries	0.00146	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000957	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-204.4	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	263.1	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	14.82	%	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.

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

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-1.585	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

Export Control

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.

Tb3CuGeS7

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control