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An energy‐dispersive X‐ray diffraction study of mean‐square atom displacements in highly oriented pyrolytic graphite
Author(s) -
Metzger T. H.
Publication year - 1986
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889886089641
Subject(s) - pyrolytic carbon , highly oriented pyrolytic graphite , diffraction , bragg's law , atom (system on chip) , graphite , materials science , scattering , bragg peak , mean squared displacement , x ray crystallography , debye model , debye–waller factor , debye , thermal , atomic physics , molecular physics , crystallography , optics , condensed matter physics , chemistry , physics , thermodynamics , computational chemistry , molecular dynamics , composite material , pyrolysis , beam (structure) , organic chemistry , computer science , embedded system
The measurement of the mean‐square thermal displacement 〈 u 2 〉 of carbon atoms in highly oriented pyrolytic graphite (HOPG) in the hexagonal c direction is reported. Energy‐dispersive X‐ray diffraction (EDXD) has been used to study the integrated intensity of all Bragg reflections 004 through 0 ′ 0 ′ 14 as a function of temperature. It is demonstrated that the correction of the Bragg intensities due to thermal diffuse scattering contributions is very important for HOPG, when EDXD is used. The Debye temperature Θ D = 554 (30) K is obtained.