A simple Bragg-spacing comparator is described which achieves a routine precision of 3 parts in l0 s in lattice-spacing measurements. One conventional X-ray source and three detectors are required and measurements take only 10 min. The instrument is used to survey the lattice-parameter variations in silicon crystals manufactured by many different suppliers since 1965.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.