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| Names | |
|---|---|
| Other names Thallium monobromide | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider |
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| ECHA InfoCard | 100.029.239 |
| EC Number |
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| UNII | |
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| Properties | |
| TlBr | |
| Molar mass | 284.287 g/mol[1] |
| Appearance | yellow crystalline solid[1] |
| Density | 7.5 g/cm3[1] |
| Melting point | 460 °C (860 °F; 733 K)[1] |
| Boiling point | 819 °C (1,506 °F; 1,092 K)[1] |
| 0.59 g/mL (25 °C)[1][2] | |
Solubility product (Ksp) | 3.71×10−6[3] |
| −63.9·10−6 cm3/mol[4] | |
Refractive index (nD) | 2.418 (0.59 μm) 2.350 (0.75 μm) 2.289 (1 μm) 1.984 (5 μm) 2.322 (20 μm)[5] |
| Structure | |
| CsCl,cP2 | |
| Pm3m, No. 221[6] | |
Formula units (Z) | 1 |
| Cubic (Tl+) Cubic (Br−) | |
| Hazards | |
| GHS labelling: | |
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| Danger | |
| H300,H330,H373,H411 | |
| P260,P264,P270,P271,P273,P284,P301+P310,P304+P340,P310,P314,P320,P321,P330,P391,P403+P233,P405,P501 | |
| Related compounds | |
Otheranions | Thallium(I) fluoride, Thallium(I) chloride, Thallium(I) iodide |
Othercations | Indium(I) bromide, Lead(II) bromide Bismuth bromide |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Thallium(I) bromide is achemical compound ofthallium andbromine with achemical formula TlBr. This salt is used in room-temperature detectors of X-rays, gamma-rays and blue light, as well as in near-infrared optics.
It is asemiconductor with aband gap of 2.68 eV.[7]
The crystalline structure is of cubicCsCl type at room temperature, but it lowers to theorthorhombicthallium iodide type upon cooling, the transition temperature being likely affected by the impurities.[8] Nanometer-thin TlBr films grown on LiF, NaCl or KBr substrates exhibit arocksalt structure.[6]
Like all soluble thallium salts, thallium bromide is extremely toxic and a cumulative poison which can be absorbed through the skin. Acute and chronic effects of ingesting thallium compounds include fatigue, limb pain, peripheral neuritis, joint pain, loss of hair, diarrhea, vomiting, vision loss, and damage to central nervous system, liver and kidneys.[9]
