Accession Number : AD0778933

Title :   Single Crystal Diffraction Patterns from Vitreous Carbon.

Descriptive Note : Rept. for May 70-Nov 72,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Whittaker,Arthur G. ; Tooper,Bernadine

Report Date : 15 MAY 1974

Pagination or Media Count : 23

Abstract : Many previous studies of vitreous carbon by x-ray diffraction show broad diffraction maxima typical of vitreous materials. However, electron diffraction studies reveal many regions that give single crystal patterns. Although some of the patterns are of graphite, as expected, many patterns were obtained that correspond to other carbon crystal forms such as chaoite and carbon VI. In addition, ring patterns of lonsdaleite and diamond were found. Finally, patterns were obtained that do not correspond to any of the known carbon allotropes. (Author)

Descriptors :   *Carbon, *Crystal structure, *Electron diffraction, Diamonds, Graphite, Amorphous materials, Single crystals

Subject Categories : Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE