UF 4 and the High-Pressure Polymorph HP-UF 4
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Tutkijat
Organisaatiot
- University of Marburg
- University of Cologne
- University of Innsbruck
Kuvaus
A laboratory-scale synthesis of UF 4 is presented that utilizes the reduction of UF 6 with sulfur in anhydrous hydrogen fluoride. An excess of sulfur can be removed by vacuum sublimation, yielding pure UF 4 , as shown by powder X-ray diffraction, micro X-ray fluorescence analysis, infrared and Raman spectroscopy, as well as magnetic measurements. Furthermore, a single-crystalline, high-pressure modification of UF 4 was obtained in a multi-anvil press at elevated temperatures. The high-pressure polymorph HP-UF 4 was characterized by means of single-crystal and powder X-ray diffraction, as well as by magnetic measurements, and presents a novel crystal structure type. Quantum-chemical calculations show the HP-modification to be 10 kJ mol −1 per formula unit higher in energy compared to UF 4 .
Yksityiskohdat
Alkuperäiskieli | Englanti |
---|---|
Sivut | 7366-7374 |
Sivumäärä | 9 |
Julkaisu | Chemistry - A European Journal |
Vuosikerta | 25 |
Numero | 30 |
Tila | Julkaistu - 28 toukokuuta 2019 |
OKM-julkaisutyyppi | A1 Julkaistu artikkeli, soviteltu |
ID: 33943626