J. Phys. France 50, 1145-1151 (1989)
DOI: 10.1051/jphys:0198900500100114500

EXAFS study of graphite intercalation compounds with transition metals (Fe, Ni)

A.T. Shuvayev^{1, 2}, B.Yu. Helmer^{1, 2}, TA. Lyubeznova^{1, 2}, V.L. Kraizman^{1, 2}, A.S. Mirmilstein^{1, 2}, L.D. Kvacheva^{1, 2}, Yu.N. Novikov^{1, 2} et M.E. Volpin<sup>1, 2

1</sup>  Institute of Physics, Rostov State University, 344006 Rostov-on-Don, U.S.S.R.
²  Institute of Organo-Element Compounds, Academy of Sciences of the USSR, V-334 Moscow, U.S.S.R.

Abstract
Graphite intercalation compounds with Fe and Ni have been investigated by means of EXAFS spectroscopy. Iron atoms have been shown to form π-type complexes where the carbon net acts as a polydentate aromatic ligand. In contrast, nickel atoms form two-dimensional monolayers with close-packed hexagonal structure.

Résumé
Les composds d'insertion du graphite avec le Fe et Ni ont été étudiés par EXAFS. On montre que les atomes de fer forment des complexes de type π ou le réseau de carbone joue le rôle d'un ligand aromatique polydentate. Par contre, les atomes de nickel forment des monocouches bidimensionnelles dans un arrangement hexagonal compact.

PACS
6110H - X-ray absorption spectroscopy: EXAFS, NEXAFS, XANES, etc..
6166F - Inorganic compounds.

Key words
EXAFS -- graphite intercalation compounds -- iron -- nickel