Protactinium (V) fluoride

Crystal structure
	__ Pa 5+ __ F -
Crystal system	tetragonal
Space group	I 4 2 d (No. 122)
Lattice parameters	a = 1153 pm ; c = 510 pm
General
Surname	Protactinium (V) fluoride
other names	Protactinium pentafluoride
Ratio formula	PaF 5
Brief description	white solid
External identifiers / databases
Wikidata	Q4493226
properties
Molar mass	307.09 g mol −1
Physical state	firmly
solubility	soluble in water and hydrofluoric acid (dihydrate)
Hazard and safety information
	; Radioactive
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Protactinium (V) fluoride is a chemical compound consisting of the elements protactinium and fluorine . It has the formula PaF ₅ and belongs to the fluoride class of substances .

presentation

Protactinium (V) fluoride can be obtained by reacting protactinium (V) oxide with bromine (III) fluoride or bromine (V) fluoride at 600 ° C.

{\ displaystyle {\ ce {3 Pa2O5 + 10 BrF3 (6 BrF5) -> 6 PaF5 + 5 Br2 (3 Br2) + 7.5 O2}}}

It is also possible to display it by reacting protactinium (V) chloride or protactinium (IV) fluoride with fluorine at 700 ° C.

{\ displaystyle {\ ce {2 PaF4 + F2 -> 2 PaF5}}}

Protactinium (V) fluoride hydrate can be obtained by reacting protactinium (V) oxide with aqueous hydrofluoric acid .

{\ displaystyle {\ ce {Pa2 O5 + 10 HF -> 2 PaF5. 2 H2O + 6 H2O}}}

The thermal decomposition of protactinium-fluorine complexes also partially leads to protactinium (V) -fluoride,

properties

Protactinium (V) fluoride is a white, volatile, extremely hygroscopic solid that is partially soluble in water and better in hydrofluoric acid. It has a tetragonal crystal structure of the β- uranium pentafluoride type with the space group I 4 2 d (space group no. 122) with the lattice parameters a = 1153 pm, c = 510 pm. Quartz and Pyrex are attacked by the compound at higher temperatures. As a dihydrate, it is a colorless, hygroscopic, crystalline solid with a waxy texture that is soluble in water and hydrofluoric acid. It reacts with phosphorus trifluoride to form protactinium (IV) fluoride. The dihydrate cannot be converted into the anhydrate in air, hydrogen fluoride and fluorine at low temperatures. Instead, diprotactinium (V) oxide octafluoride Pa ₂ OF _{8 is formed} . At higher temperatures around 325 ° C a mixture of the latter and protactinium (V) fluoride is formed. Template: room group / 122

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g Georg Brauer , with the assistance of Marianne Baudler u. a. (Ed.): Handbook of Preparative Inorganic Chemistry . 3rd, revised edition. tape I . Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , pp. 1170 .
↑ 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.
^ ^A ^b G. Meyer, Lester R. Morss: Synthesis of Lanthanide and Actinide Compounds . Springer, 1991, p. 77 ( 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) . Springer, 2010, ISBN 978-94-007-0211-0 , pp. 198 ( limited preview in Google Book Search).

[brauer-1] ↑ ^a ^b ^c ^d ^e ^f ^g Georg Brauer , with the assistance of Marianne Baudler u. a. (Ed.): Handbook of Preparative Inorganic Chemistry . 3rd, revised edition. tape I . Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , pp. 1170 .

[NV-2] 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.

[G._Meyer,_Lester_R._Morss-3] A ^b G. Meyer, Lester R. Morss: Synthesis of Lanthanide and Actinide Compounds . Springer, 1991, p. 77 ( limited preview in Google Book search).

[Lester_R._Morss,_Norman_M._Edelstein,_J._Fuger-4] Lester R. Morss, Norman M. Edelstein, J. Fuger (Eds.): The Chemistry of the Actinide and Transactinide Elements (Set Vol. 1-6) . Springer, 2010, ISBN 978-94-007-0211-0 , pp. 198 ( limited preview in Google Book Search).