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An X‐Ray Diffraction Study of Rubidium Chloride
Author(s) -
Järvinen M.,
Inkinen O.
Publication year - 1967
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19670210110
Subject(s) - rubidium , ion , intensity (physics) , scattering , atomic physics , chemistry , chloride , bragg peak , diffraction , crystal (programming language) , analytical chemistry (journal) , beam (structure) , optics , physics , potassium , organic chemistry , chromatography , computer science , programming language
Absolute X‐ray intensity measurements are made of Bragg reflexions from rubidium chloride powders at 300 °K by direct measurement of the intensity of the primary beam. It is found that the effects of preferred orientation, surface roughness, and extinction are negligible. Values for the temperature parameters of B Rb = (2.28 ± 0.10) Å 2 and B Cl = (2.44 ± 0.10) Å 2 are obtained; these correspond to the Debye temperature Θ = (157 ± 4) °K. The values of the crystal radii of the ions are found to be R Rb = (1.71 ± 0.05) Å and R Cl = (1.58 ± 0.05) Å. Deviations from spherical symmetry are revealed in the outer electron distribution of the chlorine ions. Throughout the entire angular range examined, the average trend of the experimental scattering factors of both ions is found to coincide with the theoretical free‐ion values to within 1.5%.