RESEARCH ON X-RAY DETERMINATION OF PRECISION LATTICE PARAMETERS.
Abstract
The application of the centroid method to powder line profiles obtained with the X-ray diffractometer is shown to lead to lattice parameters which are independent of the diffraction angle. Thus it appears that the lattice parameter is free of systematic errors and that the centroid method has properly accounted for the aberrations which distort and shift the line profile. The instrumentation and methodology necessary for results of the highest precision are discussed. The effect of interferences from the Kalpha3,4 satellites and Kbeta lines is described. Three different methods that have been proposed for the determination of centroids were investigated and applied to both spectral and powder line profiles, and the necessity for 'equivalence' between the centroids of the spectral profile and the line profile is discussed. The line shapes and the centroids of observed and analytic spectral profiles are compared for both CuKalpha and FeKalpha radiations. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1962
- Accession Number
- AD0607638
Entities
People
- Jeanne Taylor
- Marian Mack
- William Parrish