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X‐Ray Determination of the Debye Temperature of Uranium Monocarbide
Author(s) -
Colella R.,
Dragone D.,
Merlini A.
Publication year - 1969
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.19690360113
Subject(s) - debye model , atmospheric temperature range , uranium , debye , logarithm , range (aeronautics) , materials science , analytical chemistry (journal) , radiation , x ray , atomic physics , chemistry , condensed matter physics , physics , thermodynamics , optics , metallurgy , mathematics , mathematical analysis , chromatography , composite material
Bragg reflections by single crystals of UC, cleaved along (100) planes, were found to have negligible extinction for values of sin ϑ/λ in the range from 0.4 to 1.2 Å −1 . The integrated intensities of these reflections were measured by using MoKα radiation at various temperatures from 77 to 773 °K. Plots of the logarithm of the integrated intensities vs. temperature, or vs. (sin ϑ/λ) 2 at a fixed temperature, were straight lines. The slopes of the plotted lines yielded an average value θ M = (265 ± 5). °K for the Debye temperature defined in terms of the uranium atoms only, and θ M = (366 ± 7) °K, using the average of the U and C masses in the Debye‐Waller factor. These values are compared with those determined by different experimental techniques.