Sodium sulfide (Na2S) is an inorganic ionic compound that exhibits semiconductor behavior and is classified as a wide-bandgap material within the sulfide family. It is primarily encountered in industrial chemistry and materials research rather than as an engineered structural material. Applications span pulp and paper processing (kraft process), mining and metallurgy (flotation reagent), leather tanning, textile dyeing, and laboratory synthesis of metal sulfides; researchers also investigate Na2S for emerging applications in energy storage, photocatalysis, and solid-state ionics due to its ionic conductivity and sulfide chemistry.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 30.03 | GPa | — | ||
Poisson's Ratio(ν) | 0.2400 | - | — | ||
Shear Modulus(G) | 18.92 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 1.869 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 2.400 | eV | — | ||
| ↳ | 2.590 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)2 entries | 7.040 | - | — | ||
| ↳ | 6.601 | - | — | ||
Electronic Dielectric Tensor(ε∞) | Matrix (redacted) | - | — | ||
Total Dielectric Tensor(ε) | Matrix (redacted) | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij) | 0.000 | C/m² | — | ||
Seebeck Coefficient(S) | -86.77 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.01110 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -1.265 | eV/atom | — | ||
| ↳ | -1.212 | eV/atom | — |