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Study of Dislocation Distribution in NaClNaBr and NaClCaCl 2 Crystals Grown from Melt
Author(s) -
Sankaram T. Bhima,
Raju I. V. K. Bhagavan
Publication year - 1986
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.2170210212
Subject(s) - impurity , dislocation , materials science , doping , crystallography , mineralogy , chemistry , optoelectronics , organic chemistry
Dislocation distribution and content have been studied using etch pit method in the single crystals of mixed solids NaClNaBr and NaClCaCl 2 . In both the solid solutions the dislocation content is higher as compared to that in pure crystals of NaCl and NaBr grown under similar conditions. In mixed crystals of NaClNaBr the block structure of subgrain boundaries is not observed. The subgrain boundaries are highly fragmentary and the dislocations form arrays running randomly to short distances. In NaCl crystals doped with CaCl 2 dislocation loops and impurity‐decorated dislocations are observed. The dislocation content is higher in impurity segregated regions. The impurity decorates both isolated dislocations and subgrain boundaries in calcium‐doped crystals. The results are discussed.