Hg2 I4

semiconductor

· Hg2 I4

Hg₂I₄ is a mercury iodide semiconductor compound belonging to the family of heavy metal halides, with a layered crystal structure that exhibits interesting optoelectronic properties. This material is primarily of research interest for radiation detection applications and optoelectronic devices, where its high atomic number and band gap characteristics make it attractive for detecting high-energy photons and particles; however, it remains largely experimental due to toxicity concerns with mercury and the availability of more established alternatives like cadmium telluride and lead halide perovskites for commercial deployments.

gamma-ray detectorsradiation sensingexperimental optoelectronicshigh-energy physics instrumentationresearch semiconductors

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)	2,181.9	ksi	—
Shear Modulus(G)	885.7	ksi	—

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

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	0.9695	eV	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-0.2340	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.

Hg2 I4

Mechanical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control