TlCl
semiconductor· TlCl
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.
infrared optics and windowsradiation detection (research)high-energy physics instrumentationscintillation detectorsspecialized semiconductor research
Compliance & Regulations
?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 2,943.8 | ksi | — | ||
| ↳ | 4,119.1 | ksi | — | ||
Poisson's Ratio(ν) | 0.3200 | - | — | ||
Shear Modulus(G)2 entries | 920 | ksi | — | ||
| ↳ | 1,696.9 | ksi | — |
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 | |
|---|---|---|---|---|---|
Density(ρ) | 0.2549 | lb/in³ | — |
Verified Unverified Low confidence (<80%) Link to source
| 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 | — |
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)2 entries | -1.058 | eV/atom | — | ||
| ↳ | -1.048 | eV/atom | — |
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
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.