Holmium(III) fluoride is an inorganic compound with a chemical formula of HoF3.

Preparation

Holmium(III) fluoride can be produced by reacting holmium oxide and ammonium fluoride, then crystallising it from the ammonium salt formed in solution:[3]

Ho2O3 + 6NH4F ⟶ 2HoF3 + 6NH3 + 2H2O

It can also be prepared by directly reacting holmium with fluorine:[4]

2Ho + 3F2 → 2HoF3

Properties

Holmium(III) fluoride is a yellowish powder that is insoluble in water.[5] It has an orthorhombic crystal system (corresponding to β-YF3[6]) with the space group Pnma (space group no. 62).[7] However, there is also a trigonal low-temperature form of the lanthanum(III) fluoride type.[3]

References

  1. ^ a b "Holmium Fluoride".
  2. ^ Shaimuradov, I. B.; Reshetnikova, L. P.; Novoselova, A. V. Phase diagram of the potassium fluoride-holmium fluoride system. Izvestiya Akademii Nauk SSSR, Neorganicheskie Materialy, 1974. 10 (8). 1468-1471. ISSN 0002-337X.
  3. ^ a b Janiak, Christoph; Meyer, Hans-Jürgen; Gudat, Dietrich; Alsfasser, Ralf (2012-01-27). Riedel Moderne Anorganische Chemie (in German). Walter de Gruyter. ISBN 978-3-11-024901-9.
  4. ^ "Chemical reactions of Holmium". Webelements. Retrieved 2009-06-06.
  5. ^ Holmium(III) fluoride at AlfaAesar, accessed on 2023-12-22 (PDF) (JavaScript required).[dead link‍]
  6. ^ Sobolev, Boris P. (2001). The rare earth trifluorides Introduction to materials science of multicomponent metal fluoride crystals. Arxius de les seccions. Barcelona: Institut d'Estudis Catalans. ISBN 978-84-7283-610-5.
  7. ^ Ans, Jean d'; Lax, Ellen (1998). Taschenbuch für Chemiker und Physiker (in German). Springer. ISBN 978-3-540-60035-0.
Allikas: http://en.wikipedia.org/wiki/Holmium_trifluoride
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