Abstract
SLATER'S theory1 of the origin of the ferroelectricity shown by potassium dihydrogen phosphate below 120° K. is based on the assumption that the proton of the O—H—O bond is situated in a double potential well. Above the Curie point, the proton is not permanently located in either well and moves between the two, giving the structure non-polar tetragonal symmetry. Below the Curie point the proton positions are ordered in accordance with the polar orthorhombic symmetry.
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References
Slater, J. C., J. Chem. Phys., 9, 16 (1941).
Bacon, G. E., and Pease, R. S., Proc. Roy. Soc., A, 220, 397 (1953).
Frazer, B. C., and Pepinsky, R., Acta Cryst., 6, 273 (1953).
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PEASE, R., BACON, G. Ferroelectric Structure of Potassium Dihydrogen Phosphate. Nature 173, 443–444 (1954). https://doi.org/10.1038/173443b0
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DOI: https://doi.org/10.1038/173443b0
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