S
metal· S
S is a metal with relatively low density and unusual elastic properties characterized by a negative Poisson's ratio, indicating auxetic behavior—a material that expands laterally when stretched. This counter-intuitive response to stress is rare in metals and suggests either a specialized alloy composition or a metamaterial structure designed to exhibit negative Poisson's ratio effects. The material's potential applications lie in advanced mechanical systems where unusual deformation characteristics provide engineering advantages, such as energy absorption, impact resistance, or precision control applications where traditional positive Poisson's ratio materials would be inadequate.
auxetic/metamaterial engineeringimpact absorption systemsspecialized damping applicationsprecision mechanical systemsresearch/prototype development
Compliance & Regulations
?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 2,177 | ksi | — | ||
Poisson's Ratio(ν) | -0.3100 | - | — | ||
Shear Modulus(G) | 335 | ksi | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.07580 | lb/in³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 2.024 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr) | 6.924 | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij)2 entries | 0.00520 | C/m² | — | ||
| ↳ | 0.000 | C/m² | — | ||
Piezoelectric Stress Tensor(eij) | Matrix (redacted) | C/m² | — | ||
Seebeck Coefficient(S) | -252.8 | µV/K | — |
N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form / heat treatment / basis.
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf) | -0.01574 | 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.