KHfF<sub>5</sub>: a new representative in the <i>M</i> <sup>I</sup> <i>M</i> <sup>IV</sup>F<sub>5</sub> family
We report the preparation and crystal structure of potassium hafnium pentafluoride, KHfF<sub>5</sub>, obtained by the hydrothermal technique. The compound crystallizes in the orthorhombic noncentrosymmetric space group P2<sub>1</sub>2<sub>1</sub>2<sub>1</sub>, with the unit-cell parameters a = 6.2843 (3), b = 7.8063 (3) and c = 15.8286 (7) Å. Hf atoms are coordinated by eight F atoms, forming square antiprismatic polyhedra. Bonding in pairs, HfF<sub>8</sub> antiprisms are interconnected via common F-atom edges and form a double chain of hafnium polyhedra. A comparison of the structure of KHfF<sub>5</sub> with other complex fluorides of alkali metals and hafnium, zirconium or terbium(IV) revealed that this compound has no isostructural analogue among the known phases of general composition M<sup>I</sup>M<sup>IV</sup>F<sub>5.</sub>
Authors
- В. А. Долгих (ORCID: https://orcid.org/0000-0001-9074-9039)
- В. А. Тафеенко (ORCID: https://orcid.org/0000-0001-9369-052X)
- Peter S. Berdonosov (ORCID: https://orcid.org/0000-0001-8642-8371)
- Oksana P. Grigorieva
Institutions
- Lomonosov Moscow State University (RU)
Publication Details
- Journal
- Acta Crystallographica Section C Structural Chemistry
- Published
- 2025-03-14
- DOI
- https://doi.org/10.1107/s2053229625002177
- Primary Topic
- Inorganic Fluorides and Related Compounds
- Type
- article
- Field-Weighted Citation Impact
- 0.00