Uranium (V) chloride
Crystal structure | |||||||
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__ U 5+ __ Cl - | |||||||
General | |||||||
Surname | Uranium (V) chloride | ||||||
other names |
Uranium pentachloride |
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Ratio formula | UCl 5 | ||||||
Brief description |
red-brown solid |
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External identifiers / databases | |||||||
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properties | |||||||
Molar mass | 415.29 g mol −1 | ||||||
Physical state |
firmly |
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density |
3.81 g cm −3 |
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solubility |
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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 . |
Uranium (V) chloride is a chemical compound of uranium from the group of chlorides .
presentation
Uranium (V) chloride can be obtained by reacting uranium (VI) oxide with carbon tetrachloride , using a previously prepared amount of the compound as a catalyst .
It can also be obtained by reacting uranium (IV) chloride with chlorine in a fluidized bed reactor at 550 ° C.
properties
Uranium (V) chloride is available in the form of a red-brown, microcrystalline powder or as black-red crystals with shiny metallic surfaces. In contrast to uranium (IV) chloride, it is soluble in liquid chlorine. The compound is very hygroscopic and decomposes in water or when heated into uranium (VI) chloride and uranium (IV) chloride. It reacts with organic solvents such as alcohols , acetone , diethyl ether or dioxane. Stable solutions are formed with some other solvents such as carbon tetrachloride, carbon disulfide, and thionyl chloride . The compound usually has a monoclinic crystal structure (α-form) with the space group P 2 1 / n (space group no. 14, position 2) and the lattice parameters a = 799 pm, b = 1069 pm, c = 848 pm and β = 91.5 °. However, there is also a triclinic β-form with the space group P 1 (No. 2) , which is formed by the crystallization of uranium (VI) chloride with carbon tetrachloride or dichloromethane .
Individual evidence
- ↑ a b c d e f g 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. 1208.
- ^ A b Lester R. Morss, Norman M. Edelstein, J. Fuger (Ed.): 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. 522, 1795 (English, limited preview in Google Book Search).
- ↑ 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.