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Single Crystal X-Ray Diffraction Study of the Phase Transitions in Graphite-Bromine Intercalation Compounds*

Published online by Cambridge University Press:  15 February 2011

D. Ghosh  and
D.D.L. Chung
D. Ghosh
Affiliation:
Department of Metallurgical Engineering and Materials Science, Carnegie-Mellon University, Pittsburgh, Pennsylvania, 15213, USA
D.D.L. Chung
Affiliation:
Department of Metallurgical Engineering and Materials Science, Carnegie-Mellon University, Pittsburgh, Pennsylvania, 15213, USA
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Abstract

Reported here is the first observation of an incommensurate-commensurate phase transition at 316 ± 1 K upon heating stage-2 graphite-bromine prepared in bromine liquid. The transition during heating involved the movement of the 300 reflection toward a lower q value and the sharpening of the 010 reflection, thereby resulting in the commensurate structure characteristic of stage-2 prepared in bromine vapor. The transition was reversible. The previously reported comtmensurate-incommensurate transition occurred at 326, 329, 332, 338 and 348 K for stage 2 (in bromine liquid), stage 2 (in bromine vapor), stage 3, stage 4, and desorbed material, respectively. Disordering was observed upon completion of this transition.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 20: Symposium H – Intercalated Graphite , 1982 , 15
Copyright
Copyright © Materials Research Society 1983

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Footnotes

*

Research sponsored by the Ceramics Program of the National Science Foundation, Grant No. DMR-7926242.

References

REFERENCES

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