Zirconium trifluoride

Zirconium trifluoride
Names
IUPAC name
trifluorozirconium
Other names
Zirconium(III) fluoride
Identifiers
Properties
ZrF3
Appearance black crystals
Density 4,26 g/cm3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Zirconium trifluoride is an inorganic chemical compound with the chemical formula ZrF3.[1] This is a salt of zirconium and hydrofluoric acid, forms black crystals.

Synthesis

Zirconium difluoride can be prepared by the action of atomic hydrogen on thin layers of zirconium tetrafluoride, at a temperature of approximately 350°.[2][3]

Zirconium (III) fluoride can be obtained by reacting hydrogenated zirconium with a mixture of hydrogen fluoride and hydrogen at 750 °C.[4]

2 Zr + 6 HF ⟶ 2 ZrF3 + 3 H2

It is also possible to prepare it by reducing (NH4)2ZrF6 with hydrogen at 650 °C.[5]

Physical properties

ZrF3 forms black crystals of cubic system, in the space group Pm3m.

It is slightly soluble in hot water, slightly soluble in hot acids. Insoluble in caustic soda and ammonia solution. Its crystal structure corresponds to that of rhenium(VI) oxide.[4]

Chemical properties

ZrF3 disproportionates to the tetrafluoride when heated to 1300 °C:[3]

4 ZrF3 → 3 ZrF4 + Zr

References

  1. ^ "Zirconium trifluoride". NIST. Retrieved 19 July 2024.
  2. ^ Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3177. ISBN 978-0-412-30120-9. Retrieved 19 July 2024.
  3. ^ a b McTaggart, F. K.; Turnbull, A. G. (1964). "Zirconium difluoride". Australian Journal of Chemistry. 17 (7): 727–730. doi:10.1071/ch9640727. ISSN 1445-0038. Retrieved 19 July 2024.
  4. ^ a b Georg Brauer (Hrsg.), unter Mitarbeit von Marianne Baudler u. a.: Handbuch der Präparativen Anorganischen Chemie. 3., umgearbeitete Auflage. Band I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6, S. 259.
  5. ^ Paul Ehrlich, Fritz Plöger, Ernst Koch, Gustav Kaupa: Über Zirkonium(III)-fluorid. Versuche zur Darstellung von Thorium(III)-fluorid. In: Zeitschrift für anorganische und allgemeine Chemie. 333, 1964, S. 209–215, doi:10.1002/zaac.19643330407.


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