Zirconium (IV) fluoride
Crystal structure | ||||||||||
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__ Zr 4+ __ F - | ||||||||||
Crystal system | ||||||||||
Space group |
I 2 / c (No. 15, position 6) |
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Lattice parameters |
a = 957 pm |
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General | ||||||||||
Surname | Zirconium (IV) fluoride | |||||||||
other names |
Zirconium tetrafluoride |
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Ratio formula | ZrF 4 | |||||||||
Brief description |
white solid |
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External identifiers / databases | ||||||||||
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properties | ||||||||||
Molar mass | 167.22 g mol −1 | |||||||||
Physical state |
firmly |
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density |
4.43 g cm −3 |
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Melting point |
910 ° C |
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Refractive index |
1.59 |
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safety instructions | ||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C |
Zirconium (IV) fluoride is an inorganic chemical compound of zirconium from the group of fluorides .
Extraction and presentation
Zirconium (IV) fluoride can be obtained by reacting zirconium (IV) chloride with hydrogen fluoride .
It is also possible to display it by reacting zirconium (IV) oxide with hydrofluoric acid
or thermal decomposition of (NH 4 ) 2 ZrF 6 .
properties
Zirconium (IV) fluoride is a white, highly refractive, translucent mass that is sparingly soluble in water. From 50 ° C upwards, the compound hydrolyzes in water. The anhydrate has a monoclinic crystal structure with the space group I 2 / a (space group No. 15, position 3) , whereby in addition to the stable β-form there is also a tetragonal α-form ( space group P 4 2 / m (No. 84) ) and a γ-form exist. The β-form consists of square antiprisms ZrF 8 ; each fluorine atom coordinates two zirconium atoms. The trihydrate has a dimeric structure with a triclinic crystal structure. The monohydrate has a tetragonal crystal structure with the space group I 4 2 d (No. 122) .
use
Zirconium (IV) fluoride is used as a raw material for the manufacture of optical glass fibers and optical glasses, especially for IR spectrometry. It is also used as an admixture to nuclear fuels.
Individual evidence
- ↑ C. Legein, F Fayon, C. Martineau, M. Body, JY Buzare, D. Massiot, E. Durand, A. Tressaud, A. Demourgues, O. Peron, B. Boulard: 19 F high magnetic field NMR study of beta-ZrF 4 and CeF 4 : From spectra reconstruction to correlation between fluorine sites and 19 F isotopic chemical shifts . In: Inorganic Chemistry , 2006 , 45 (26) , pp. 10636-10641 doi : 10.1021 / ic061339a .
- ↑ a b c d e f data sheet Zirconium (IV) fluoride, 99.9% trace metals basis from Sigma-Aldrich , accessed on October 13, 2013 ( PDF ).
- ↑ Data sheet zirconium (IV) fluoride from AlfaAesar, accessed on October 13, 2013 ( PDF )(JavaScript required) .
- ↑ a b c d Georg Brauer , with the assistance of Marianne Baudler a . a. (Ed.): Handbook of Preparative Inorganic Chemistry . 3rd, revised edition. tape I . Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , pp. 260 .
- ^ R. Papiernik, D. Mercurio, B. Frit: Structure du tetrafluorure de zirconium, ZrF 4 alpha . In: Acta Crystallographica , 1982 , B38 , pp. 2347-2353 doi : 10.1107 / S0567740882008760
- ^ Chemical Thermodynamics of Zirconium . Gulf Professional Publishing, 2005, ISBN 0-08-045753-3 , pp. 144 ( limited preview in Google Book search).
- ↑ Roger Blachnik (Ed.): Paperback for chemists and physicists . Volume III: Elements, Inorganic Compounds and Materials, Minerals . founded by Jean d'Ans, Ellen Lax. 4th, revised and revised edition. Springer, Berlin 1998, ISBN 3-540-60035-3 , pp. 818 ( limited preview in Google Book search).
- ↑ RL Davidovich, MA Pushilin, VB Logvinova, AV Gerasimenko: Crystal structure of monoclinic modifications of zirconium and hafnium tetrafluoride trihydrates. In: Journal of Structural Chemistry. 54, 2013, pp. 541-546, doi : 10.1134 / S0022476613030104 .
- ↑ B. Kojic-Prodic, F. Gabela, Z. Ruzic-Toros, M. Sljukic: Structure of aquatetrafluorozirconium (IV). In: Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry. 37, pp. 1963-1965, doi : 10.1107 / S0567740881007772 .
- ↑ Catherine E. Housecroft: Inorganic Chemistry . Pearson Education, 2005, ISBN 0-13-039913-2 , pp. 652 ( limited preview in Google Book search).
- ^ William S. Rees, Jr .: CVD of Nonmetals . John Wiley & Sons, 2008, ISBN 3-527-61480-X , pp. 370 ( limited preview in Google Book search).
- ↑ Dan Gabriel Cacuci: Handbook of Nuclear Engineering. Vol. 5: Fuel Cycles, Decommissioning, Waste Disposal and Safeguards . Springer, 2010, ISBN 0-387-98130-6 , pp. 2961 ( limited preview in Google Book search).