Abstract
Intercalation of UF 6 into graphite, both from the gaseous phase and from the Ledon 113 solution, was studied. The amount of intercalated UF 6 from the gaseous phase was found to be inversely proportional to the size of graphite particles. Intercalation increases with the increasing temperature and surface area of graphite. The contact of gaseous UF 6 with graphite led to the formation of β-UF 5 that is not intercalated, In the Ledon solution β-UF 5 is not formed. ‘Passivation’ of graphite by elementary fluorine also prevents the formation of β-UF 5 but the amount of intercalated UF 6 decreases. The intercalation of UF 6 into graphite from the gaseous phase is accompanied by the increase of the distance between the parallel carbon atom layers up to the values of about 884 pm. Ternary intercalates graphite -UF 6 -Ledon 113 are formed during the intercalation of UF 6 from the Ledon 113 solutions and the distance between the parallel carbon atom layers 848–875 pm. Thermogravimetry in the presence of air revealed that the binary intercalates graphite -UF 6 decompose in a 3-step reaction while the ternary intercalates decompose in a 4-step reaction, In both cases uranium hexafluoride is not released but acts as a fluorination agent on the graphite carbon.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call