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The coefficient of self-diffusion for argon is measured from 68 to 291 atmos at 49.4°C. A radioactive tracer technique employing A37 is used and coefficients are measured in a cell in which the path of diffusion is through a plug of porous bronze. Results agree reasonably well with the Enskog dense gas theory calculated from p-v-T data.
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Mifflin et al. (1958) studied this question.
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