Changes in orientation of etch pits produced on the cubic faces of diamond
- 1 December 1972
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine
- Vol. 26 (6) , 1275-1280
- https://doi.org/10.1080/14786437208220341
Abstract
Cube faces of synthetic and natural diamonds have been etched in KNO3 in the temperature range 500° to 800°C Some of the square pits change orientation at 600°c, their sides lying along instead of . The re-orientation is inhibited by agitation of the crystals during etching. Two-beam interferograms show that only the deeper, larger pits undergo such re-orientation. It is conjectured that this occurs at sites of rapid local etching, and is associated with accumulation of reaction by-products.Keywords
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