X-ray crystal photography at low temperatures

Abstract

Low temperature X-ray photographs can be taken very simply, by enclosing the substance, solid or liquid, in a thin cellophane tube, and allowing a narrow stream of liquid oxygen to pour constantly over it. Such photographs can be used for investigations of low temperature crystal structure, coefficients of expansion, problems involving the heat motions of atoms and molecules, analysis or identification of unknown liquids or mixtures of liquids.