X-Ray Measurement of Long Range Order in β-Brass

Abstract

The long range order in β-Brass has been determined by measuring the integrated intensity of the (100) superstructure reflection from a single crystal held at various temperatures. With a single crystal, and CuKα-radiation obtained by a balanced Ni-Co filter, there is ample intensity for measurement with a Geiger counter spectrometer. The measured long range order parameter S is in satisfactory agreement with the theoretical predictions.