We have studied stage transformations of binary potassium-graphite intercalation compounds by in-situ x-ray (00ℓ) scans. In the transition region of stages one and two, both stages coexist and all Bragg reflections exhibit resolution limited widths. The characteristics of the stage transformation are identical in intercalated HOPG and single crystals. This implies that the stage transformation is a direct process with no need of forming intermediate structures, favoring electrostatic interaction as the dominant stabilizer for pure stage donor compounds. We have also studied the elastic distortion due to potassium atoms substitutionally dissolved in rubidium intercalant layers. From the interlayer spacing variation we find a double force tensor Pzz = 0.36 eV for potassium defects in RbC8 in the small defect concentration region.
This is a preview of subscription content, access via your institution.
Buy single article
Instant access to the full article PDF.
Tax calculation will be finalised during checkout.
S. A. Safran and D. R. Hamann, Phys. Rev. B 22, 606 (1980).
M. E. Misenheimer and H. Zabel, Phys. Rev. B 26, (1982) (Rapid Comm.)
N. Daumas and A. Hérold, Bull. Soc. Chim. Fr. 5, 1598 (1971).
D. Billaud and A. Hérold, Bull. Soc. Chim. Fr. 1, 103 (1972); 11, 2402 (1974); 11, 2407 (1974).
G. Leibfried and N. Breuer, Point Defects in Metals I, Springer Tracts in Modem Physics, Vol. 81, Springer, Berlin, Heidelberg, New York, 1977.
International Tables of X-Ray Crystallography, Kynoch, Birmingham (1968).
H. Zabel and A. Magerl, Phys. Rev. B 25, 2463 (1962).
About this article
Cite this article
Misenheimer, M.E., Chow, P. & Zabel, H. Binary and Ternary Alkali Graphite Intercalation Compounds: In-Situ X-Ray Study of Elastic and Electrostatic Effects on Staging. MRS Online Proceedings Library 20, 283 (1982). https://doi.org/10.1557/PROC-20-283