Abstract
NMR and X-ray diffraction studies of granular samples of the intermetallic compounds, CsAu and RbAu, are reported. Studies of X-ray line intensities indicate that the CsCl lattice structure is well ordered for both materials. For the semiconducting compound CsAu, excess Cs in the lattice is shown to be the primary source of conduction electrons. X-ray studies show an expansion of lattice constant with addition of excess Cs. Measurements of NMR line shapes, Knight shifts, and relaxation times for CsAu confirm that the excess Cs is atomically dispersed in the samples. NMR measurements show our RbAu samples to have a metallic nature. However, the metallic characteristics may well derive from excess Rb known to be present in the samples.
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