Electron Probe Micro Analysis of Screw-dislocation on Agate Surface Treated with Minute Amount of Uranium

Abstract

Studies of EPMA (Electron Probe Micro Analysis) profiles of the screw dislocation on the agate surface have not probably been made. The author measured the profiles acrossing the dislocation on a polished agate surface which hadbeen treated with uranium salt solution.The purpose of the application of uranium was to emphasize the dislocation features apd to reveal a germ stage of epitaxial growth of the radioactive element on the dislocation.
A topograph of thesubjected, area was measured by using secondary electron for the sake of. comparison of it with UM.line-profile.
The result obtained is as follows: the profiles showed remarkably heterogeneous deposition of uranium on the dislocation site