The structure of beryllium, with particular reference to temperatures above 1200°C

Abstract

Research was conducted at Atomic Weapons Research Establishment to investigate the conflicting reports concerning the modifications of Be and to study the effect of purity on solid state changes. Electrical resistance measurements, thermal analysis, and x-ray lattice parameter measurements were used. The measurements were carried out at temperatures of -196 to 1290 deg C. The data obtained in the latter two measurements, particularly those above 1200 deg C, are of particular interest. Results are presented tabularly and graphically in addition to phase diagrams and x-raydiffraction spectra. (J.R.D.)