X-ray diffraction study of the stacking faults in hexagonal C70 single crystals

Issue		Europhys. Lett. Volume 33, Number 3, January 1996


Page(s)		205 - 210
Section		Condensed matter: structure, thermal and mechanical properties
DOI		http://dx.doi.org/10.1209/epl/i1996-00322-3

X-ray diffraction study of the stacking faults in hexagonal C70 single crystals DOI: 10.1209/epl/i1996-00322-3

Europhys. Lett, 33 (3), pp. 205-210 (1996)

X-ray diffraction study of the stacking faults in hexagonal single crystals

E. Blanc , H.-B. Bürgi , R. Restori , D. Schwarzenbach and Ph. Ochsenbein

Institute of Crystallography, University of Lausanne
BSP, CH-1015 Lausanne, Switzerland
Laboratory of Crystallography, University of Bern
Freiestrasse 3, CH-3012 Bern, Switzerland

(received 31 July 1995; accepted 6 December 1995)

PACS. 61.72Dd - Experimental determination of defects by diffraction and scattering.
PACS. 61.72Nn - Stacking faults and other planar or extended defects.
PACS. 61.66Bi - Elemental solids.

Abstract:

Pure

crystallizes in close-packed crystal structures. Both the hexagonal close packing (h.c.p.) and the cubic close packing (c.c.p.) are known to exist. X-ray diffraction from single crystals with hexagonal habitus shows rods of diffuse intensity typical of stacking faults. The intensities of three of these rods were measured at room temperature with synchrotron radiation, and interpreted with a growth fault model assuming a depth of interaction of three layers. The result indicates the presence of both h.c.p. and c.c.p. domains, the former containing fewer stacking faults than the latter. The probability to find an h-stack of three layers ( e.g., ABA) anywhere in the crystal is only about 60%.

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