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Thallium(I) chloride

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Thallium(I) chloride

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This page is a soft redirect. Names

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IUPAC names
Thallium monochloride
Thallium(I) chloride
Other names
Thallous chloride
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7791-12-0 7pxY ChEBI CHEBI:37117 7pxY ChemSpider 23044 7pxY Jmol-3D images Image PubChem Template:Chembox PubChem/format colspan=2 style="background:#f8eaba; border-top:2px solid transparent; border-bottom:2px solid transparent; text-align:center;" #REDIRECTmw:Help:Magic words#Other
This page is a soft redirect. Properties

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TlCl Molar mass 239.82 g/mol Appearance white, odorless crystalline solid Density 7.004 g/cm3 (20 °C) Melting point Script error: No such module "convert". Boiling point Script error: No such module "convert". (decomposes) 0.29 g/100 mL (15.5 °C)
0.318 g/100 mL (20 °C)
2.41 g/100 mL (100 °C) [1] Solubility insoluble in alcohol, acetone, NH4OH 2.247 colspan=2 style="background:#f8eaba; border-top:2px solid transparent; border-bottom:2px solid transparent; text-align:center;" #REDIRECTmw:Help:Magic words#Other
This page is a soft redirect. Hazards

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SDS http://www.crystran.co.uk/uploads/files/178.pdf EU Index 081-002-00-9 EU classification Very toxic (T+)
Dangerous for the environment (N) R-phrases R26/28, R33, R51/53 S-phrases (S1/2), S13, S28, S45, S61 24 mg/kg, oral, mouse colspan=2 style="background:#f8eaba; border-top:2px solid transparent; border-bottom:2px solid transparent; text-align:center;" #REDIRECTmw:Help:Magic words#Other
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Other anions
Thallium(I) fluoride
Thallium(I) bromide
Thallium(I) iodide
Other cations
Thallium(III) chloride
Silver(I) chloride
Lead(II) chloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Thallium(I) chloride is the chemical compound with the formula TlCl. This colourless solid is an intermediate in the isolation of thallium from its ores. Typically, an acidic solution of thallium(I) sulfate is treated with hydrochloric acid to precipitate insoluble thallium(I) chloride. This solid crystallizes in the caesium chloride motif.[2]

The low solubility of TlCl is exploited in chemical synthesis: treatment of metal chloride complexes with TlPF6, gives the corresponding metal hexafluorophosphate derivative. The resulting TlCl precipitate is separated by filtration of the reaction mixture. The overall methodology is similar to the use of AgPF6, except that Tl+ is much less oxidizing.

The crystalline structure is of cubic CsCl type at room temperature, but it lowers to the orthorombic thallium iodide type upon cooling, the transition temperature being likely affected by the impurities.[3][4][5]

A very rare mineral lafossaite, Tl(Cl,Br), is a natural form of thallium(I) chloride.[6]

Thallium(I) chloride, like all thallium compounds, is highly toxic, although its low solubility limits its toxicity to a degree.

References

  1. ^ Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8
  2. ^ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.
  3. ^ M Blackman et al "The Polymorphism of Thallium and Other Halides at Low Temperatures" Proc. Phys. Soc. 77 (1961) 471
  4. ^ A-V Mudring "Thallium Halides – New Aspects of the Stereochemical Activity of Electron Lone Pairs of Heavier Main-Group Elements" Eur. J. Inorg. Chem. 6 (2007) 882
  5. ^ R. P. Lowndes and C. H. Perry "Molecular structure and anharmonicity in thallium iodide" J. Chem. Phys. 58, 271 (1973)
  6. ^ http://www.mindat.org/min-27521.html