Thallium chloride (TlCl) is an ionic semiconductor compound from the thallium halide family, characterized by its direct bandgap and high density. Historically used in infrared optical systems and specialized radiation detection applications, TlCl has seen limited commercial adoption due to toxicity concerns and the availability of superior alternatives like cadmium telluride and mercuric iodide detectors. The material remains of interest in research contexts for high-energy physics instrumentation and niche optoelectronic applications where its specific optical properties provide advantages, though its use is heavily restricted in many jurisdictions.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 20.30 | GPa | — | ||
| ↳ | 28.40 | GPa | — | ||
Poisson's Ratio(ν) | 0.3200 | - | — | ||
Shear Modulus(G)2 entries | 6.343 | GPa | — | ||
| ↳ | 11.70 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 7.055 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 3.560 | eV | — | ||
| ↳ | 2.208 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)2 entries | 40.82 | - | — | ||
| ↳ | 29.37 range 5.824–52.91median of 2 measurements | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij) | 0.000 | C/m² | — | ||
Seebeck Coefficient(S) | -134.9 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -1.058 | eV/atom | — | ||
| ↳ | -1.048 | eV/atom | — |