Measurements made by Grube and Klaiber in 1934 on the alloys of lithium and lead indicate that a transformation of peculiar character occurs in the betahyphen;phase of these alloys. The behavior of this transformation under high hydrostatic pressure has been investigated by measurements of the electrical resistance. The results, together with those from rough thermal expansion measurements, indicate that the transition takes place gradually on heating from a phase of abnormally high energy and entropy content to a phase of more normal character. Xhyphen;ray analyses suggest that the transition is accompanied by movements of the lithium atoms in the lattice to more orderly positions.
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