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Zeitschrift für Kristallographie - Crystalline Materials

Editor-in-Chief: Pöttgen, Rainer

Ed. by Antipov, Evgeny / Boldyreva, Elena V. / Friese, Karen / Huppertz, Hubert / Tiekink, E. R. T.

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Volume 126, Issue 1-3


Electron-optical studies of etch patterns on calcium fluoride

A. R. Patel / S. M. Patel
Published Online: 2010-07-28 | DOI: https://doi.org/10.1524/zkri.1968.126.1-3.214


Calcium-fluoride cleavages obtained from natural and synthetic crystals have been etched; the etch patterns, studied with an electron microscope by preparing single-stage carbon replicas shadowed with chromium. It is observed that no correlation of the etch patterns exist on the two sides of thin plates. The electron micrographs have revealed unusual round bottomed pits, and pits with slightly deformed structure; these have been attributed to the nature of imperfections at which they are nucleated. It is observed that pits divide, and thus pits are formed within the pits. By taking electron micrographs of the etch pattern on corresponding regions of matched pairs, it is shown that there is one-to-one correspondence, in number and position, of etch pits if the division of the etch pits is ignored; nevertheless correlation in the division of the etch pits is not observed. Thus it is conjectured that there exists a dislocation network in the body of calcium fluoride. The implications are discussed.

About the article

Published Online: 2010-07-28

Published in Print: 1968-01-01

Citation Information: Zeitschrift für Kristallographie, Volume 126, Issue 1-3, Pages 214–221, ISSN (Online) 0044-2968, ISSN (Print) 1433-7266, DOI: https://doi.org/10.1524/zkri.1968.126.1-3.214.

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