SCHOTTKY DEFECT ENERGY OF SOME BINARY METAL HYDRIDE AND DEUTERIDE CRYSTALS

Schottky defect energies of some binary metal hydrides and deuterides are discussed with reference to conductivity measurements and the rece nt computer simulation calculations. An empirical relation with Debye temperature is found to yield values of Schottky defect formation ener gies of Li(H,D) systems in reasonable agreement with experiments. The relationship is also utilized to obtain the formation energies for Na( H,D) systems for which experimental values are not available in the li terature.