Ho4 Cu4 S8

semiconductor

· Ho4 Cu4 S8

Ho₄Cu₄S₈ is a quaternary semiconductor compound combining rare-earth (holmium), transition metal (copper), and chalcogen (sulfur) elements. This is a research-phase material primarily studied for potential thermoelectric and optoelectronic applications, where the combination of rare-earth and copper sulfide chemistry offers possibilities for tuning electronic and thermal transport properties that differ from conventional binary or ternary semiconductors.

thermoelectric devicesoptoelectronic researchrare-earth semiconductor compoundssolid-state physics studiesadvanced materials development

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)	10,769.9	ksi	—
Shear Modulus(G)	4,599.6	ksi	—

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

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	1.734	eV	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-1.489	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.

Ho4 Cu4 S8

Mechanical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control