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Defect characterization of mixed SrCa tartrates
Author(s) -
Patel A. R.,
Arora S. K.
Publication year - 1978
Publication title -
kristall und technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0023-4753
DOI - 10.1002/crat.19780131212
Subject(s) - indentation hardness , dislocation , vickers hardness test , ion , materials science , entropy (arrow of time) , octahedron , crystallography , chemistry , mineralogy , thermodynamics , crystal structure , microstructure , physics , organic chemistry
A few defect characteristics which are typical of gel‐grown mixed single crystals of SrCa tartrates (Sr 1−X Ca x C 4 H 4 O 6 · 4H 2 O) having different concentration, x, of the cations have been described. The temperature of decomposition has been found to be related, to some extent, to dislocation concentration. The magnitude of configurational entropy, which is a manifestation of lattice disorder, has been computed. The Vickers microhardness and dislocation density of crystals have been found to bear good correlation. An empirical formula has been suggested to explain the observed variation in microhardness with the concentration of ions in the mixed lattice.