Abstract
DURING an X-ray diffraction investigation of the potassium graphites1, we concluded that the reduction in potassium concentration within the intercalate layer, which occurs on passing from stage 1 (C8K) to stage n (C12nK), is accompanied by a loss of long range order within the layer. A study of the stage 2 compound has now shown that this disordered intercalate structure (form I) transforms reversibly to an ordered state (form II) at a temperature of about −175°C.
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References
Nixon, D. E., and Parry, G. S., Brit. J. Appl. Phys. (in the press).
Moore, A. W., Ubbelohde, A. R., and Young, D. A., Proc. Roy. Soc., A, 280, 153 (1964).
Herold, A., Bull. Soc. Chim., 999 (1955).
Nixon, D. E., Parry, G. S., and Ubbelohde, A. R., Proc. Roy. Soc., A, 291, 324 (1966).
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PARRY, G., NIXON, D. Order–Disorder Transformation in Potassium Graphite. Nature 216, 909–910 (1967). https://doi.org/10.1038/216909a0
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DOI: https://doi.org/10.1038/216909a0
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