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Temperature dependence of lattice parameters of langasite single crystals
Author(s) -
Kräußlich J.,
Höfer S.,
Zastrau U.,
Jeutter N.,
Baehtz C.
Publication year - 2010
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.201000034
Subject(s) - thermal expansion , trigonal crystal system , lattice (music) , atmospheric temperature range , quadratic equation , diffraction , condensed matter physics , thermal , materials science , nonlinear system , single crystal , lattice constant , chemistry , crystal structure , thermodynamics , crystallography , physics , optics , mathematics , composite material , geometry , quantum mechanics , acoustics
To determine the coefficient of thermal expansion of trigonal langasite (La 3 Ga 5 SiO 14 ) the two independent lattice parameters a and c are measured over a temperature range of 800 °C using X‐ray diffraction on single crystal samples. From the given nonlinear temperature dependence the linear and quadratic thermal coefficients of expansion α 11 , β 11 and α 33 , β 33 for the two lattice parameters a and c could be deduced. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)