XRD measurements of the structure factors of diamond

Abstract

Abstract Sixtyseven structure factors for a spheroidal, single crystal of diamond (max diam = 0.052 cm, min diam = 0.040 cm) were measured by XRD with synchrotron radiation and λ = 0.4 Å. The data were corrected for isotropic extinction from measurements taken with λ = 0.7 Å. The whole sphere of reflections, up-to a resolution of 0.27 Å, was observed. The esd's of the structure factors were of the order of 0.006 e/atom and 0.002 e/atom for the low (except 111) and high order reflections, respectively. Despite of the large size of the specimen, the observed data agreed better with published theoretical structure factors than previous experimental structure factors. It is the first complete XRD single crystal data-set since 1939.