Thallium (III) fluoride
Crystal structure | |||||||||||||||||||
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__ Tl 3+ __ F - | |||||||||||||||||||
Crystal system | |||||||||||||||||||
Space group |
Pnma (No. 62) |
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Lattice parameters |
a = 5.81 Å , b = 6.97 Å, c = 4.84 Å |
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General | |||||||||||||||||||
Surname | Thallium (III) fluoride | ||||||||||||||||||
other names |
Thallium trifluoride |
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Ratio formula | TlF 3 | ||||||||||||||||||
Brief description |
white solid |
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External identifiers / databases | |||||||||||||||||||
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properties | |||||||||||||||||||
Molar mass | 261.38 g mol −1 | ||||||||||||||||||
Physical state |
firmly |
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density |
8.36 g cm −3 (25 ° C) |
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Melting point |
550 ° C (decomposition) |
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solubility |
Decomposes in water |
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safety instructions | |||||||||||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Thallium (III) fluoride is an inorganic chemical compound of thallium from the group of fluorides .
Extraction and presentation
Thallium (III) fluoride can be obtained by reacting thallium (III) oxide with fluorine , boron trifluoride or sulfur tetrafluoride .
properties
Thallium (III) fluoride is a white, very moisture-sensitive solid that reacts immediately with water to form a black body.
The compound decomposes when heated in air, but can be melted in a fluorine atmosphere. It has an orthorhombic crystal structure with the space group Pnma (space group no. 62) and the lattice constants a = 5.81 Å , b = 6.97 Å, c = 4.84 Å analogous to that of ytterbium (III) fluoride .
Individual evidence
- ↑ a b c d e Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 242.
- ↑ a b c d e data sheet Thallium (III) fluoride, 99% from Sigma-Aldrich , accessed on September 26, 2013 ( PDF ).
- ↑ Balaram Sahoo, Nimain C. Nayak, Asutosh Samantaray, Prafulla K. Pujapanda, Sahoo Balaram, nayak Nimai Charan, samantaray Asutosh, pujapanda Prafulla Kumar: Inorganic Chemistry . 2012, ISBN 978-81-203-4308-5 , pp. 263 ( limited preview in Google Book search).
- ^ JJ Zuckerman: Inorganic Reactions and Methods, The Formation of Bonds to Group VIB (O, S, Se, Te, Po) Elements . John Wiley & Sons, 2009, ISBN 978-0-470-14540-1 , pp. 485 ( limited preview in Google Book search).
- ^ Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer DE, 1998, ISBN 3-642-58842-5 , pp. 776 ( limited preview in Google Book search).
- ↑ C. Hebecker, R Hoppe: On the crystal structure of indium and thallium trifluoride . In: Naturwissenschaften , 1966 , 53 , p. 104.
- ^ Peter Paetzold: Chemistry: An introduction . Walter de Gruyter, 2009, ISBN 978-3-11-021135-1 , p. 204 ( limited preview in Google Book search).