Abstract
A series of experiments is described in which slices of InP, homogeneously doped with radioactive silver, were subjected to heat treatments. At the end of these 'out-diffusions' the profiles of radiotracer silver in the slices were determined. The results were anomalous in the sense that they did not correspond to the expected solutions of Fick's law. In particular the measured profiles showed surface concentrations which exceeded the bulk concentrations. The conclusion is drawn that the diffusion mechanism for silver in InP is not a simple one and that the silver atoms must exist in the lattice in more than one form. An attempt is made to relate these results to a recent model for silver in InP. Reasonable qualitative agreement is found.
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