Accession Number : AD0692222

Title :   OBSERVATION OF DISLOCATIONS IN ALPHA-ARSENIC SINGLE CRYSTALS BY X-RAY DIFFRACTION TOPOGRAPHY.

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF APPLIED CHEMISTRY

Personal Author(s) : Shetty,M. N. ; Taylor,J. B. ; Calvert,L. D.

Report Date : 1969

Pagination or Media Count : 14

Abstract : X-ray diffraction topographs were obtained from large arsenic single crystals. The camera employed copper K alpha radiation from a microfocus tube and an oscillating assemble of Soller slits limited the beam divergence. Reflections of the type (11-2) and (2-20) (primitive rhombohedral cell) were used to characterize dislocation Burgers vectors. The technique has been applied to arsenic single crystals grown from the vapour and from the melt. The majority of dislocations were found to belong to Burgers vectors <110>. Comparison has been made between dislocation etch pit patterns on (111) surfaces and X-ray topographs. (Author)

Descriptors :   (*ARSENIC, DISLOCATIONS), (*DISLOCATIONS, X RAY DIFFRACTION), CRYSTAL GROWTH, SINGLE CRYSTALS, CANADA

Subject Categories : Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE