An X-Ray Camera for Obtaining Powder Pictures at High Pressures

Abstract

Two methods are described of obtaining x-ray powder diffraction pictures of materials subjected to high hydrostatic pressures. Both techniques have been successfully employed to identify simple high pressure structures at pressures ranging up to 15,000 atmos. The essential feature common to both schemes is to encase the sample in a small beryllium bomb which serves to retain the pressure but permits the x-rays to be transmitted to the sample and diffracted to an external recording film. Sample data on cerium are given to illustrate the possibilities and limitations of this technique.