TY - JOUR
T1 - UF
4
and the High-Pressure Polymorph HP-UF
4
AU - Scheibe, Benjamin
AU - Bruns, Jörn
AU - Heymann, Gunter
AU - Sachs, Malte
AU - Karttunen, Antti J.
AU - Pietzonka, Clemens
AU - Ivlev, Sergei I.
AU - Huppertz, Hubert
AU - Kraus, Florian
PY - 2019/5/28
Y1 - 2019/5/28
N2 - 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 .
AB - 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 .
KW - actinoids
KW - fluorine
KW - high-pressure chemistry
KW - magnetic properties
KW - uranium
UR - http://www.scopus.com/inward/record.url?scp=85065435241&partnerID=8YFLogxK
U2 - 10.1002/chem.201900639
DO - 10.1002/chem.201900639
M3 - Article
AN - SCOPUS:85065435241
SN - 0947-6539
VL - 25
SP - 7366
EP - 7374
JO - Chemistry: A European Journal
JF - Chemistry: A European Journal
IS - 30
ER -