Hf4 S4 O4

semiconductor

· Hf4 S4 O4

Hf4S4O4 is an oxysulfide semiconductor compound combining hafnium, sulfur, and oxygen in a mixed-anion system. This material belongs to the family of transition metal chalcogenides and oxychalcogenides, which are primarily investigated in research contexts for their tunable electronic and optical properties that differ from conventional single-anion semiconductors. Engineers and materials researchers explore such compounds for next-generation optoelectronic and photocatalytic applications where the dual anionic framework can offer advantageous band structure characteristics and chemical stability compared to traditional semiconductors.

photocatalytic applicationsoptoelectronic devicesthin-film researchsemiconductor researchenergy conversion materialsmaterials screening studies

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)	148.5	GPa	—
Shear Modulus(G)	61.84	GPa	—

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

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	2.870	eV	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-2.771	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.

Hf4 S4 O4

Mechanical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control