:Thallium(I) bromide

{{chembox

| Verifiedfields = changed

| Watchedfields = changed

| verifiedrevid = 470605464

| Name = Thallium(I) bromide

| ImageFile1 = CsCl polyhedra.png

| ImageName1 = Thallium(I) bromide

| OtherNames = Thallium monobromide

|Section1={{Chembox Identifiers

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

| ChemSpiderID = 56428

| InChI = 1/BrH.Tl/h1H;/q;+1/p-1

| InChIKey = PGAPATLGJSQQBU-REWHXWOFAZ

| SMILES = Br[Tl]

| StdInChI_Ref = {{stdinchicite|correct|chemspider}}

| StdInChI = 1S/BrH.Tl/h1H;/q;+1/p-1

| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}

| StdInChIKey = PGAPATLGJSQQBU-UHFFFAOYSA-M

| CASNo = 7789-40-4

| CASNo_Ref = {{cascite|correct|CAS}}

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = W18FF0756H

| PubChem = 62677

| EINECS = 232-163-0

}}

|Section2={{Chembox Properties

| Formula = TlBr

| MolarMass = 284.287 g/molHaynes, p. 4.94

| Appearance = yellow crystalline solid

| Density = 7.5 g/cm³

| Solubility = 0.59 g/mL (25 °C){{cite journal | url=https://doi.org/10.1021/ed040p34 | doi=10.1021/ed040p34 | title=A radiochemistry experiment: The solubility of thallium(I) bromide | date=1963 | last1=Sheppard | first1=John C. | last2=Jensen | first2=Reilly C. | journal=Journal of Chemical Education | volume=40 | issue=1 | page=34 | bibcode=1963JChEd..40...34S | url-access=subscription }}

| SolubilityProduct = 3.71{{e|−6}}{{cite book |author1=John Rumble |title=CRC Handbook of Chemistry and Physics |date=June 18, 2018 |publisher=CRC Press |isbn=978-1138561632 |pages=5–189|edition=99 |language=English}}

| MeltingPtC = 460

| BoilingPtC = 819

| MeltingPt_ref =

| BoilingPt_ref =

| RefractIndex = 2.418 (0.59 μm)
2.350 (0.75 μm)
2.289 (1 μm)
1.984 (5 μm)
2.322 (20 μm)Haynes, p. 10.242

| MagSus = −63.9·10⁻⁶ cm³/molHaynes, p. 4.135

}}

|Section3={{Chembox Structure

| CrystalStruct = CsCl, cP2

| SpaceGroup = Pm{{overline|3}}m, No. 221

| LattConst_a =

| UnitCellFormulas = 1

| UnitCellVolume =

| Coordination = Cubic (Tl⁺)
Cubic (Br⁻)

}}

|Section7={{Chembox Hazards

| GHSPictograms = {{GHS06}}{{GHS08}}{{GHS09}}

| GHSSignalWord = Danger

| HPhrases = {{H-phrases|H300|H330|H373|H411}}

| PPhrases = {{P-phrases|260|264|270|271|273|284|301+310|304+340|310|314|320|321|330|391|403+233|405|501}}

}}

|Section8={{Chembox Related

| OtherAnions = Thallium(I) fluoride,
Thallium(I) chloride,
Thallium(I) iodide

| OtherCations = Indium(I) bromide,
Lead(II) bromide
Bismuth bromide

}}

}}

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.[https://ieeexplore.ieee.org/document/4291773 Temperature Dependence of Spectroscopic Performance of Thallium Bromide X- and Gamma-Ray Detectors]

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.{{cite journal|doi=10.1088/0370-1328/77/2/331|bibcode=1961PPS....77..471B|title=The Polymorphism of Thallium and Other Halides at Low Temperatures|journal=Proceedings of the Physical Society|volume=77|issue=2|pages=471|year=1961|last1=Blackman|first1=M|last2=Khan|first2=I H}} Nanometer-thin TlBr films grown on LiF, NaCl or KBr substrates exhibit a rocksalt structure.{{cite journal|doi=10.1107/S0365110X51001641|title=Polymorphism of cesium and thallium halides|journal=Acta Crystallographica|volume=4|issue=6|pages=487–489|year=1951|last1=Schulz|first1=L. G.|bibcode=1951AcCry...4..487S }}

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.[http://www.espimetals.com/msds's/thalliumbromide.pdf Thallium Bromide Material safety data sheet] {{Webarchive|url=https://web.archive.org/web/20071030210616/http://www.espimetals.com/msds%27s/thalliumbromide.pdf |date=2007-10-30 }}. espimetals.com