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Piezoelectric and Elastic Properties of Orthorhombic LiH 2 PO 3 and LiH 2 PO 4
Author(s) -
Haussühl S.
Publication year - 1996
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170310310
Subject(s) - thermoelastic damping , pyroelectricity , piezoelectricity , chemistry , orthorhombic crystal system , aqueous solution , tourmaline , dielectric , potassium , quartz , alkali metal , mineralogy , analytical chemistry (journal) , crystallography , materials science , thermodynamics , crystal structure , physics , composite material , ferroelectricity , thermal , optoelectronics , metallurgy , organic chemistry , chromatography
Single crystals of LiH 2 PO 3 and LiH 2 PO 4 , both of space group symmetry Pna2 1 , with dimensions up to 40 mm were grown from aqueous solutions by controlled evaporation. Pyroelectric, dielectric, piezoelectric, elastic and thermoelastic properties were studied by standard methods. The static piezoelectric constants d 333 exceed d 111 of α‐quartz by only a factor 2. The pyroectric effects reach 3 times and 7 times, respectively, that of tourmaline. The mean elastic stiffness of the phosphite is 13% smaller than that of the phosphate, a phenomenon also observed in the corresponding sodium and potassium salts.