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The chemical diffusion coefficient, D ̃, in metal-deficit manganous sulphide, Mn 1−y S, has been determined as a function of temperature (700–1273K) and sulphur activity (10 4 –10 −1 Pa) from re-equilibration kinetics. It has been found that D ̃ does not depend on p(S 2 ) and can be described as a function of temperature by the following empirical equation. D ̃=5...
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