Polarization effects in xanesof layered materials : alkali-graphite intercalation compounds study

Christian Frétigny , D. Bonnin , Robert Cortès (1)

1 LISE - Laboratoire Interfaces et Systèmes Electrochimiques

X-ray absorption spectra in the near edge region of alkali graphite intercalation compounds are reported. MC8 and MC24 (M = K, Rb, Cs) compounds are lamellar and their spectra exhibit a high orientation dependence. At each energy, a linear regression analysis of the absorption for different incidence angles (θ ≤ 40°) permits to obtain the limiting case spectrum θ = 90°. In the case of potassium, where the core hole lifetime is large, implying a small broadening of the spectra, comparison is made with published band structures, showing selection rules effects.

Domaines: Articles anciens; Chimie

Christian Frétigny, D. Bonnin, Robert Cortès. Polarization effects in xanesof layered materials : alkali-graphite intercalation compounds study. Journal de Physique Colloques, 1986, 47 (C8), pp.C8-869-C8-873. ⟨10.1051/jphyscol:19868168⟩. ⟨jpa-00226072⟩