Cu4 Sb4 S8

semiconductor

· Cu4 Sb4 S8

Cu₄Sb₄S₈ is a quaternary sulfide semiconductor compound belonging to the famatinite mineral family, characterized by a complex crystal structure containing copper, antimony, and sulfur. This material is primarily of research interest for thermoelectric and photovoltaic applications, where its narrow bandgap and mixed-valence cation chemistry offer potential for efficient energy conversion in medium-temperature regimes. Cu₄Sb₄S₈ and related copper antimony sulfides are being investigated as alternatives to lead-based and bismuth-based thermoelectrics for waste heat recovery and solid-state cooling, as well as for thin-film photovoltaic devices, though commercial deployment remains limited compared to more established semiconductor families.

thermoelectric power generationwaste heat recoverythin-film photovoltaicssolid-state cooling devicesresearch semiconductorsmineral analogs for electronic materials

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)	51.69	GPa	—
Shear Modulus(G)	26.77	GPa	—

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

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	0.8288	eV	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-0.3170	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.

Cu4 Sb4 S8

Mechanical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control