Protactinium (V) chloride
Crystal structure | |||||||||||||
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● Pa 5+ ○ Cl - | |||||||||||||
Crystal system | |||||||||||||
Space group |
C 2 / c (No. 15) |
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Lattice parameters |
a = 797 pm |
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General | |||||||||||||
Surname | Protactinium (V) chloride | ||||||||||||
Ratio formula | PaCl 5 | ||||||||||||
Brief description |
yellow monoclinic crystals |
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External identifiers / databases | |||||||||||||
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properties | |||||||||||||
Molar mass | 408.30 g mol −1 | ||||||||||||
Physical state |
firmly |
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density |
3.74 g cm −3 |
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Melting point |
306 ° C |
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boiling point |
420 ° 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 (V) chloride is a chemical compound of protactinium and chlorine with the formula PaCl 5 .
presentation
Protactinium (V) chloride can be obtained by reacting protactinium (V) oxide with thionyl chloride , carbon tetrachloride or carbon and chlorine.
properties
Protactinium (V) chloride crystallizes with a yellow color in the monoclinic crystal system in the space group C 2 / c (space group no. 15) with the lattice parameters a = 797 pm , b = 1135 pm, c = 836 pm and β = 106.4 ° with four formula units per unit cell . It has a chain structure consisting of 7-fold coordinated non-regular pentagonal bipyramids , each dividing the edges of the pentagons.
safety instructions
Classifications according to the CLP regulation are not available because they only include the chemical hazard, which plays a completely subordinate role compared to the hazards based on radioactivity . The latter also only applies if the amount of substance involved is relevant.
Individual evidence
- ↑ a b c d e f g h R. P. Dodge, GS Smith, Q. Johnson, RE Elson: "The Crystal Structure of Protactinium Pentachloride", in: Acta Cryst. , 1967 , 22 , pp. 85-89; doi : 10.1107 / S0365110X67000155 .
- ↑ a b c David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Properties of the Elements and Inorganic Compounds, pp. 4-84.
- ↑ Protactinium (V) chloride at www.webelements.com.
- ↑ 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.
- ↑ Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 1173.
literature
- Boris F. Myasoedov, Harold W. Kirby, Ivan G. Tananaev: Protactinium , in: Lester R. Morss, Norman M. Edelstein, Jean Fuger (eds.): The Chemistry of the Actinide and Transactinide Elements , Springer, Dordrecht 2006; ISBN 1-4020-3555-1 , pp. 161-252; doi : 10.1007 / 1-4020-3598-5_4 .