133Cs-NMR studies on first-stage CsBi-GICs

Abstract The 133 Cs-NMR spectra of stage 1, α-phase CsBi-graphite intercalation compounds (GIC) exhibit a quite complex structure which is strongly orientation dependent. Comparison with the alloy used to prepare the samples suggest that one of the lines (with shift - 0.051%) is due to inclusions of the alloy. Knight shift and T 1 -measurements prove a larger conduction electron density at the Cs sites compared to stage 2 and 3 compounds. The degree of ionization of Cs in first stage, α-phase CsAs-GIC is larger than in the CsBi-GIC.