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Sub-boundaries on (002) cleavages of Li2CO3 single crystals

✍ Scribed by Dr. K. S. Raju; M. Palaniswamy; Dr. P. Ramasamy; Dr. G. S. Laddha

Publisher: John Wiley and Sons
Year: 1984
Tongue: English
Weight: 510 KB
Volume: 19
Category: Article
ISSN: 0232-1300
DOI: 10.1002/crat.2170190714

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✦ Synopsis

Sub-boundaries on (002) Cleavages of Li,CO, Single Crystals

Linear arrays of dislocation? (straight, terminating and curved) are observed on etching with 2'3h citric acid (002) cleavages of lithium carbonate (Li,CO,) single crystals, grown by zone nielting technique. As the dislocations are non-uniformly spaced and disappear on successib e etching, they may not be revealing low-angle grain boundary, nor slip traces as they are terminating and curved nieaning crystallographically non-oriented. On the observation of experiments on successive etching and etching of matched pairs, it is (*oncluded that the arraysof etch pitsreveal dislocation walls (dislocation density 1.1 x lo6 -1.5 x 10' pits e r r 2 ) probably created due t o the localized thermal stresses released as a result of high temperature annealing of the crystal during growth. The implications are discussed.

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