Praseodymium (III) fluoride

Crystal structure
__ Pr 3+      __ F -
Crystal system	hexagonal
Space group	P 6 3 / mcm (No. 193)
Coordination numbers	Pr [9], F [3]
General
Surname	Praseodymium (III) fluoride
other names	Praseodymium fluoride Praseodymium trifluoride
Ratio formula	PrF 3
Brief description	green hexagonal crystals
External identifiers / databases
CAS number 13709-46-1 EC number 237-254-9 ECHA InfoCard 100,033,853 PubChem 83677 Wikidata Q2107847
properties
Molar mass	197.90 g mol −1
Physical state	firmly
density	6.3 g cm −3 (20 ° C)
Melting point	1399 ° C
boiling point	2300 ° C
solubility	almost insoluble in water
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 301-311-331 P: 261-280-301 + 310-311
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Praseodymium (III) fluoride (PrF ₃ ) is a salt of the rare earth metal praseodymium .

Extraction and presentation

Praseodymium (III) fluoride can be obtained by reacting praseodymium (III) oxide or praseodymium (III, IV) oxide with hydrogen fluoride or chlorine trifluoride .

${\displaystyle \mathrm {Pr_{2}O_{3}+6\ HF\longrightarrow 2\ PrF_{3}+3\ H_{2}O} }$

properties

Praseodymium (III) fluoride is a green, odorless, hygroscopic solid that is insoluble in water.

use

Praseodymium (III) fluoride is used as a doping material in laser crystals.

Individual evidence

1. ↑ ML Afanasiev, SP Habuda, AG Lundin: The symmetry and basic structures of LaF ₃ , CeF ₃ , PrF ₃ and NdF ₃ . In: Acta Cryst. , 1972 , B28 , pp. 2903-2905, doi : 10.1107 / S0567740872007198 .
2. ↑ ^{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.
3. ^ Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer DE, 1998, ISBN 3-642-58842-5 , pp. 672 ( limited preview in Google Book search).
4. ↑ ^{a b} Data sheet Praseodymium (III) fluoride, anhydrous, REacton®, 99.9895% (REO) from AlfaAesar, accessed on September 29, 2013 ( PDF )(JavaScript required) .
5. ↑ ^{a b} Data sheet Praseodymium (III) fluoride, anhydrous, powder, 99.99% trace rare earth metals basis from Sigma-Aldrich , accessed on September 29, 2013 ( PDF ).
6. ^ JH Simons: Fluorine Chemistry . Elsevier, 2012, ISBN 0-323-14724-0 , pp. 99 ( limited preview in Google Book search).
7. ↑ 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. 254.
8. ↑ Hotan Shalibeik: Rare-Earth-Doped Fiber Lasers and Amplifiers . Cuvillier Verlag, 2007, ISBN 3-86727-467-3 , p. 69 ( limited preview in Google Book search).