GeSb2Te4

ceramic

· JVASP-102749· GeSb2Te4

GeSb2Te4 is a chalcogenide compound belonging to the GST (Germanium-Antimony-Tellurium) family, widely recognized as a phase-change material (PCM) that reversibly transitions between amorphous and crystalline states. This material is the active component in rewritable optical media (DVDs, Blu-rays) and emerging non-volatile memory technologies, where rapid, reversible crystallization enables reliable data storage with excellent cyclability and thermal stability compared to conventional alternatives.

phase-change memory (PCM)optical data storage mediarewritable DVDs and Blu-raysnon-volatile memory devicesthermal energy harvestingprogrammable metamaterials

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.2210	lb/in³	—

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

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	0.3450	eV	—
Magnetic Moment(μB)	0.000	µB	—

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

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000500	eV/atom	—
Formation Energy(ΔHf)	-0.1245	eV/atom	—

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

Regulatory Screening

Environmental

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.

GeSb2Te4

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental