TmAs

semiconductor

· TmAs

TmAs is a compound semiconductor composed of thulium and arsenic, belonging to the III-V semiconductor family. This narrow-bandgap material is primarily of research interest for infrared optoelectronics and thermoelectric applications, where its properties enable detection and conversion of mid-to-long wavelength radiation. While not yet widely commercialized like GaAs or InAs, TmAs represents a specialized option for engineers developing advanced infrared sensors and thermal management systems that require materials with specific bandgap characteristics in the heavy rare-earth arsenic family.

infrared sensors and detectorsthermoelectric devicesnarrow-bandgap semiconductorsrare-earth compound researchoptoelectronic materials developmentspecialized IR applications

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	12,129.5	ksi	—
Poisson's Ratio(ν)	0.2200	-	—
Shear Modulus(G)	8,922.7	ksi	—

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.3114	lb/in³	—

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

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	1.180	eV	—
↳	0.000	eV	—
Magnetic Moment(μB)	0.000	µB	—
Seebeck Coefficient(S)	-10.80	µV/K	—

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	—
Formation Energy(ΔHf)	-1.560	eV/atom	—

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

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.

TmAs

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control