Abstract
Accurate integrated intensities for the Bragg reflexion of neutrons by a single crystal of KC1 have been measured at room temperature (295 ± 2°K). Measurements were made at a number of wavelengths and corrections were made for extinction and thermal diffuse scattering. The experimental data were analysed in terms of models which include both harmonic and anharmonic components in the thermal vibration of the ions and it is shown that the data indicate a significant anisotropic fourth-order anharmonic component in the thermal vibration of the chlorine ions. The values obtained for the harmonic temperature factors are in excellent agreement with other recent determinations and differences from theoretical values are attributed to isotropic anharmonic contributions. The nuclear scattering amplitude of potassium was refined to bK = 0.367 (2) × 10-12 cm., assuming a value for the nuclear scattering amplitude of chlorine of bC1 = 0.9580 (2) × 10-12 cm.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
