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The influence of chromium on self-diffusion of cations in metal-deficit man-ganous sulphide, Mn1_yS, has been studied as a function of temperature and sulphur activity, using radio-tracer technique. It has been found that the rate of Mn self-diffusion in chromium doped Mn1_yS is higher than that in pure manganous sulphide and does not depend on equilibrium sulphur pressure. In addition, the activation...
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