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Crystal data and crystal growth of ferroelastic Pb 3 GeO 5
Author(s) -
Neurgaonkar R. R.,
Wolfe R. W.,
Newnham R. E.
Publication year - 1974
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/s0021889874009642
Subject(s) - monoclinic crystal system , tetragonal crystal system , ferroelectricity , crystallography , materials science , crystal (programming language) , ferroelasticity , phase (matter) , czochralski method , crystal structure , phase transition , melting point , single crystal , condensed matter physics , chemistry , dielectric , physics , optoelectronics , organic chemistry , computer science , programming language , composite material
Single crystals of Pb 3 GeO 5 were grown from the melt by the Czochralski technique. Based on observations of the domain structure under mechanical stress, and the presence of an SHG signal, the crystals are ferroelastic and possibly ferroelectric, but show no phase transitions up to the melting point (738°C). The powder pattern was indexed on a monoclinic unit cell: a = 5.235±0.006 b = 5.244± 0.007, c = 5.45± 0.01 Å, β = 92°39′ + 6′, Z = 1. Intensity calculations suggest a close relation to the tetragonal Cd 3 SiO 5 structure.