Fresnel fringe contrast of faceted voids within gem‐quality diamond
- 1 July 1983
- journal article
- Published by Wiley in Journal of Microscopy
- Vol. 131 (1) , 63-66
- https://doi.org/10.1111/j.1365-2818.1983.tb04231.x
Abstract
SUMMARY: The topology of faceted void‐like defects (‘voidites’) in gem‐quality type la diamonds has been revealed by high resolution phase‐contrast electron microscopy. Interpretation of the images in terms of a Fresnel contrast mechanism allows the defects to be identified as octahedral in shape. Image contrast is sensitive to defocus and other parameters, and Fresnel fringe interference effects may generate ‘superlattice’‐like contrast.Keywords
This publication has 4 references indexed in Scilit:
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- Fresnel diffraction at {100} platelets in diamond: An attempt at defect structure analysis by high-resolution (3 Å) phase-contrast microscopyPhilosophical Magazine A, 1978
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