Ag₂HgI₄ is a ternary halide semiconductor compound combining silver, mercury, and iodine—a member of the mixed-metal iodide family studied for optoelectronic and photonic applications. This material is primarily a research compound rather than a mature industrial product, investigated for its potential in radiation detection, infrared sensing, and solid-state photonic devices where the combination of heavy metal (mercury) and noble metal (silver) constituents provides unique electronic properties. Engineers consider this material class when conventional semiconductors (Si, GaAs) are inadequate for specialized detection or sensing tasks requiring specific bandgap characteristics or radiation response.
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| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 10.78 | GPa | — | ||
| ↳ | 18.77 | GPa | — | ||
Poisson's Ratio(ν) | 0.3700 | - | — | ||
Shear Modulus(G)2 entries | 5.265 | GPa | — | ||
| ↳ | 6.200 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 5.914 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 2.470 | eV | — | ||
| ↳ | 1.066 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)3 entries | 9.320 | - | — | ||
| ↳ | 10.19 | - | — | ||
| ↳ | 7.613 range 6.117–9.110median of 2 measurements | - | — | ||
Electronic Dielectric Tensor(ε∞) | Matrix (redacted) | - | — | ||
Total Dielectric Tensor(ε) | Matrix (redacted) | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij)2 entries | 0.1041 | C/m² | — | ||
| ↳ | 0.3456 | C/m² | — | ||
Piezoelectric Stress Tensor(eij) | Matrix (redacted) | C/m² | — | ||
Seebeck Coefficient(S) | -90.18 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.01430 | eV/atom | — | ||
Formation Energy(ΔHf) | -0.1931 | eV/atom | — |