Tm2Mn2O7 — Properties & Data | MatWorld

Tm2Mn2O7

ceramic

· JVASP-46381· Tm2Mn2O7

Tm2Mn2O7 is a rare-earth manganese oxide ceramic belonging to the pyrochlore family, composed of thulium and manganese in a structured ceramic lattice. This material is primarily of research and developmental interest for applications requiring thermal stability, magnetic properties, or ionic conductivity; it has not seen widespread industrial adoption but represents the broader class of rare-earth oxides being investigated for next-generation energy storage, catalysis, and electronic applications. Engineers considering this material should recognize it as an experimental compound where material characteristics and reproducibility depend heavily on synthesis method, making it most relevant for advanced research programs rather than production-scale engineering.

experimental ceramic researchmagnetic material developmentthermal barrier coatings (research phase)solid-state ionic conductorscatalytic applicationsrare-earth oxide systems

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	7.755	kg/m³	DFT · OptB88vdW

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

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Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	1.209	eV	DFT · OptB88vdW
Electron Effective Mass(m*e)	1.200	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	2.570	me	DFT · OptB88vdW · 27°C
Thermoelectric Power Factor(PF)2 entries	0.00154	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000915	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-304.2	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	358.3	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)	-2.868	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.

Tm2Mn2O7

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental