Accession Number:

AD0739903

Title:

The Observation of Helical Dislocations in Sapphire

Descriptive Note:

Technical rept.

Corporate Author:

ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA

Report Date:

1971-12-01

Pagination or Media Count:

10.0

Abstract:

Helical dislocations have been found in sapphire for the first time. Lang X-ray diffraction topographs, including a stereotopograph revealing such helical dislocations are shown. The Burgers vectors, in all cases, have been found to be parallel to the 2-1-10 directions as well as with the axes of the helical dislocations.

Subject Categories:

  • Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE