HfAu4

metal

· JVASP-62168· HfAu4

HfAu₄ is an intermetallic compound combining hafnium and gold in a 1:4 atomic ratio, belonging to the family of refractory metal-precious metal intermetallics. This material is primarily of research and development interest rather than established in high-volume engineering applications; it combines hafnium's high melting point and strength with gold's chemical stability and density, making it relevant for extreme-environment and specialty applications where both thermal resistance and corrosion resistance are critical.

high-temperature aerospace componentsspecialized catalysis researchwear-resistant coatingsradiation environmentsjewelry/decorative metallurgymaterials research

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.6389	lb/in³	—

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

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

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

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	—
Formation Energy(ΔHf)	-0.4352	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.

HfAu4

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control