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Preparation

Holmium(III) fluoride can be produced by reacting holmium oxide and ammonium fluoride, then crystallising it from the ammonium salt formed in solution:¹

It can also be prepared by directly reacting holmium with fluorine:²

Properties

Holmium(III) fluoride is a yellowish powder that is insoluble in water.³ It has an orthorhombic crystal system (corresponding to β-YF3⁴) with the space group Pnma (space group no. 62).⁵ However, there is also a trigonal low-temperature form of the lanthanum(III) fluoride type.⁶

References

1. 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. 978-3-11-024901-9 ↩

2. "Chemical reactions of Holmium". Webelements. Retrieved 2009-06-06. https://www.webelements.com/holmium/chemistry.html ↩

3. Holmium(III) fluoride at AlfaAesar, accessed on 2023-12-22 (PDF) (JavaScript required).[dead link] https://www.alfa.com/de/catalog/432075 ↩

4. 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. 978-84-7283-610-5 ↩

5. Ans, Jean d'; Lax, Ellen (1998). Taschenbuch für Chemiker und Physiker (in German). Springer. ISBN 978-3-540-60035-0. 978-3-540-60035-0 ↩

6. 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. 978-3-11-024901-9 ↩