L.Crystal parameters of four metals when under reduced pressure

Abstract

A design of precision camera suitable for the investigation of materials at high temperatures in vacuo is briefly described. The parameters of four spectroscopically pure elements, namely, gold, platinum, palladium and rhodium, were measured with this camera. Each specimen was heated in vacuo to a high temperature, and was maintained at this temperature for a definite period of time. It was then allowed to cool slowly to atmospheric temperature and exposed in vacuo to the X-rays. The values of the parameters under these conditions confirmed those previously published for these elements.