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
| 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.