Rb4 Ti2 Cu4 S8

semiconductor

· Rb4 Ti2 Cu4 S8

Rb₄Ti₂Cu₄S₈ is a quaternary sulfide semiconductor compound combining rubidium, titanium, and copper in a mixed-valence structure. This is primarily a research material investigated for its electronic and ionic transport properties rather than an established commercial material; compounds in this family are explored for solid-state battery electrolytes, photovoltaic absorbers, and thermoelectric applications where the combination of transition metals and alkali elements can enable tunable band gaps and enhanced charge carrier mobility.

solid-state battery electrolytes (research)thin-film photovoltaics (experimental)thermoelectric generators (developmental)chalcogenide semiconductorsmixed-valence ionic conductorsmaterials screening and computational studies

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)	37.87	GPa	—
Shear Modulus(G)	22.38	GPa	—

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

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	1.725	eV	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-1.182	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.

Rb4 Ti2 Cu4 S8

Mechanical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control