The ionic conductivity and Cs+ self-diffusion have been measured in "pure", melt-grown and solution-grown single crystals of Csl over the temperature range 150-600 C. Conductivity measurements have been made on aliovalent cation and anion doped single crystals, both melt-grown and solution-grown. The Cs+ self-diffusion has also been measured in aliovalent cation doped crystals
