Thallium(I) Bromide

Thallium(I) bromide

Names
Other names Thallium monobromide
Identifiers
CAS Number	7789-40-4 Y
3D model (JSmol)	Interactive image
ChemSpider	56428 Y
EC Number	232-163-0
PubChem CID	62677
UNII	W18FF0756H Y
InChI InChI=1S/BrH.Tl/h1H;/q;+1/p-1 Y Key: PGAPATLGJSQQBU-UHFFFAOYSA-M Y InChI=1/BrH.Tl/h1H;/q;+1/p-1 Key: PGAPATLGJSQQBU-REWHXWOFAZ
SMILES Br[Tl]
Properties
Chemical formula	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]
Solubility in water	0.59 g/L (25 °C)[1]
Solubility product (Ksp)	3.71×10−6[2]
Magnetic susceptibility (χ)	−63.9·10−6 cm3/mol[3]
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)[4]
Structure
Crystal structure	CsCl, cP2
Space group	Pm3m, No. 221[5]
Formula units (Z)	1
Coordination geometry	Cubic (Tl+) Cubic (Br−)
Hazards
GHS pictograms
GHS Signal word	Danger
GHS hazard statements	HH300Script error: No such module "Preview warning".Category:GHS errors, HH330Script error: No such module "Preview warning".Category:GHS errors, HH373Script error: No such module "Preview warning".Category:GHS errors, HH411Script error: No such module "Preview warning".Category:GHS errors
GHS precautionary statements	P260, P264, P270, P271, P273, P284, P301+310, P304+340, P310, P314, P320, P321, P330, P391, P403+233, P405, P501
Related compounds
Other anions	Thallium(I) fluoride, Thallium(I) chloride, Thallium(I) iodide
Other cations	Indium(I) bromide, Lead(II) bromide Bismuth bromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Thallium(I) bromide is a chemical compound of thallium and bromine with a chemical 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 a semiconductor with a band gap of 2.68 eV.^[6]

The crystalline structure is of cubic CsCl type at room temperature, but it lowers to the orthorhombic thallium iodide type upon cooling, the transition temperature being likely affected by the impurities.^[7] Nanometer-thin TlBr films grown on LiF, NaCl or KBr substrates exhibit a rocksalt structure.^[5]

Thallium 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.^[8]

References

Cited sources

• Haynes, William M., ed (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. ISBN 1439855110. 

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