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Structural investigations of graphite intercalation compounds of antimony chloride fluorides by Moessbauer spectroscopy

✍ Scribed by Henry preiss; Hartmut Mehner

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
444 KB
Volume
25
Category
Article
ISSN
0008-6223

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✦ Synopsis

Natural graphite flakes were intercalated by St+&. SbCI,F and SbC&F, at T I 125Β°C for a reaction time of I 5 2 hours. The "'Sb Moessbauer spectra of the stage 2 intercalation compounds show only one intense line in the Sb( + 5) region. The spectra can be fitted both in terms of two inequivalent Sb( + 5) sites and of a single Sb( +S) site. The isomer shifts F increase by replacing Cl by F in the intercalates as well as by intercalation of the halides in the graphite lattice. The isomer shifts of the intercalation compounds are attributed to polymeric species of the type (mSbX, . SbX&. Because the spectra provide no evidence for Sb( +3), a significant oxidation of graphite is ruled out. Intercalation compounds heated for a long time at 150Β°C were found to exhibit a dramatically high concentration of Sb( + 3) which is interpreted as the result of a thermal decomposition of the pentahalides.

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