Sn7Au

metal

· JVASP-122539· Sn7Au

Sn7Au is a tin-gold intermetallic compound belonging to the Sn-Au binary system, likely representing a phase-stable composition in this alloy family. This material is primarily of interest in microelectronics and precious metal joining applications, where controlled intermetallic formation is either exploited for reliability or managed to prevent brittleness. The tin-gold system is notable in lead-free solder development and hybrid integrated circuit packaging, where specific tin-to-gold ratios influence mechanical performance and thermal cycling resistance compared to conventional lead-tin solders.

lead-free solder jointsmicroelectronic packagingflip-chip bondinghybrid IC assemblygold wire bonding interfacesthermal fatigue-resistant interconnects

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	6.099	kg/m³	—

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)	0.09100	eV/atom	—
Formation Energy(ΔHf)	0.03794	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.

Sn7Au

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control