Dislocation etching of CaWO4 crystals
- 21 July 1974
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 7 (11) , 1485-1488
- https://doi.org/10.1088/0022-3727/7/11/309
Abstract
Single crystals of calcium tungstate grown in the laboratory have been cleaved for the first time along {011} and {100} planes. These cleavages, as revealed by multiplebeam interferometric examination, prove to be fairly perfect. The etching behaviour of the various cleavages, as well as the grown faces of the crystals, is described. It has been shown that a solution of concentrated hydrofluoric acid plus chromic acid produces etch pits at the emergence sites of screw dislocations only, whereas a solution of 2N acetic acid plus chromic acid operates on both edge and screw dislocations. The results of chemical etching have been compared with those reported earlier, and the implications are discussed.Keywords
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