Abstract
Using a microsectioning technique, the diffusion of 51Cr in niobium single crystals has been measured over the temperature range 953°C-1435°C. The results obtained were fitted to the following equation: Deviations from ideal Gaussian penetration curves were observed at lower temperatures, indicating possible short-circuit diffusion paths. Observations similar to these have been reported for Nb and Ta and are believed to result from structural defects in the crystal.

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