TlI
ceramic· TlI
Thallium iodide (TlI) is an ionic ceramic compound belonging to the halide family, characterized by a rock salt crystal structure with relatively high density. Historically studied for infrared optical applications and radiation detection, TlI has limited modern industrial use due to thallium's toxicity and the availability of superior alternatives like cesium iodide and sodium iodide for scintillation and imaging. Its primary research interest today remains in specialized optoelectronic and photodetector applications where its bandgap and optical properties offer potential advantages, though commercial adoption is constrained by health, regulatory, and performance considerations.
infrared optics (experimental)radiation detection (research)scintillation detectors (legacy/niche)photodetector materials (developmental)semiconductor compounds (thin film research)
Compliance & Regulations
?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 21.47 | GPa | — | ||
Poisson's Ratio(ν) | 0.3100 | - | — | ||
Shear Modulus(G) | 9.700 | GPa | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 7.324 | kg/m³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 2.040 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)2 entries | 39.92 | - | — | ||
| ↳ | 28.75 range 7.632–49.86median of 2 measurements | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij) | 0.000 | C/m² | — | ||
Seebeck Coefficient(S) | -95.90 | 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) | 0.00880 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -0.6410 | eV/atom | — | ||
| ↳ | -0.6636 | 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
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.