The electronic structure of liquid semiconductors. NguyenV. T. 2015 Transport and ESR measurements have been made on various alloys based on lithium. From the ESR measurements the phase boundaries for some alloys of the lithium rich compositions were determined. These results supplement the available data on phase boundaries. The spin-flip scattering cross sections for several impurities in lithium were measured. These measurements confirm the downwards trend for the cross sections with increase in valence. The need to work in liquid samples to obtain reliable values of cross sections was also emphasised. The transport measurements show for the first time that semiconducting alloys can be based on simple alkali metals. A discussion on the possible experimental evidence for a Mott pseudogap is given.