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Absolute sign of piezoelectric d 33 and pyroelectric p 3 coefficients in LiClO 4 .3H 2 O.
Author(s) -
Liminga R.,
Chomnilpan S.,
Abrahams S. C.
Publication year - 1978
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/s0021889878012881
Subject(s) - absolute magnitude , ion , pyroelectricity , piezoelectricity , sign (mathematics) , antiparallel (mathematics) , polarity (international relations) , polarization (electrochemistry) , scattering , chemistry , condensed matter physics , physics , absolute zero , materials science , crystallography , analytical chemistry (journal) , atomic physics , ferroelectricity , optics , thermodynamics , mathematics , quantum mechanics , mathematical analysis , biochemistry , chromatography , galaxy , magnetic field , dielectric , cell , acoustics
The sense of the piezoelectric d 33 and the pyroelectric p 3 coefficients for LiClO 4 .3H 2 O crystals in point group 6 mm has been related to the absolute polarity and atomic arrangement, with the use of anomalous X‐ray scattering techniques. The magnitude of d 33 is about 4 × 10 −12 CN −1 , that of p 3 about 3.9 × 10 −6 Cm −2 K −1 . The absolute sense of the spontaneous polarization P s is calculated to be antiparallel to the positive c ‐axis direction. The sense of p 3 is negative indicating that the Li + ions become more deeply embedded in the nearest layers of ClO 4 − ions, and that | P s | increases, with increasing temperature. The sense of d 33 is positive, indicating that the Li + ions become displaced further from the ClO 4 − ion layer under tensile stress.