Protactinium (IV) chloride
| Crystal structure | ||||||||||
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-chlorid.png)
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| __ Pa 4+ __ Cl - | ||||||||||
| Crystal system | ||||||||||
| Space group |
I 4 1 / amd (No. 141) |
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| Lattice parameters |
a = 837.7 pm |
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| General | ||||||||||
| Surname | Protactinium (IV) chloride | |||||||||
| other names |
Protactinium tetrachloride |
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| Ratio formula | PaCl 4 | |||||||||
| Brief description |
yellow-green solid |
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| External identifiers / databases | ||||||||||
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| properties | ||||||||||
| Molar mass | 372.85 g mol −1 | |||||||||
| Physical state |
firmly |
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| density |
4.68 g cm −3 |
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| Sublimation point |
400 ° C |
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| Hazard and safety information | ||||||||||
 Radioactive |
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| As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . | ||||||||||
Protactinium (IV) chloride is a chemical compound of protactinium from the group of chlorides .
presentation
Protactinium (IV) chloride can be obtained by reducing protactinium (V) chloride with hydrogen or aluminum at 400 ° C.
It can also be made by reacting protactinium (IV) oxide with carbon tetrachloride .
It also arises from the thermal decomposition of protactinium oxychloride at 550 ° C in a vacuum.
properties
Protactinium (IV) chloride is a yellow-green, hygroscopic , crystalline solid that can be sublimed at 400 ° C in a vacuum . It is soluble in strong mineral acids and green solutions are formed. With acetonitrile the complex PaCl 4 · 4CH 3 CN is formed. It has a tetragonal crystal structure with the space group I 4 1 / amd (space group no. 141) and the lattice parameters a = 837.7 pm, c = 747.9 pm of the uranium (IV) chloride type.
Individual evidence
- ↑ a b c d e f g h i j 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. 1176.
- ↑ The hazards emanating from radioactivity do not belong to the properties to be classified according to the GHS labeling. With regard to other hazards, this substance has either not yet been classified or a reliable and citable source has not yet been found.
- ^ Harry Julius Emeleus, AG Sharpe: ADVANCES IN INORGANIC CHEMISTRY AND RADIOCHEMISTRY . Academic Press, 1970, ISBN 978-0-08-057861-3 , pp. 15 ( limited preview in Google Book search).
- ^ Lester R. Morss, Norman M. Edelstein, J. Fuger (Eds.): The Chemistry of the Actinide and Transactinide Elements (Set Vol. 1-6) . Volumes 1-6. Springer, Dordrecht 2010, ISBN 978-94-007-0211-0 , p. 201 (English, limited preview in Google Book Search).