RELATION OF MECHANICAL PROPERTIES TO THE STRUCTURE OF IONIC SOLIDS.

Abstract

The crystal structure analysis and least squares refinement of fluorophlogopite (R-factor = 6.4%) was completed in the centric space group C2/m utilizing Hanson's relative weighting scheme. The interatomic distances and thermal vibration amplitude features of the mica have been determined utilizing these refined parameters. N(Z) tests on the mica intensity data for a center of symmetry suggest the possibility that the material may be noncentric; a study has been started in this respect. The use of absolute, semi-absolute and relative weighting schemes in least squares refinements with anisotropic vibration parameters is discussed with reference to a study on ruby. The Berg-Barrett x-ray technique was successfully employed to delineate the dislocations in the (001) plane of mica. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 15, 1967
Accession Number
AD0653788

Entities

People

  • K. Vedam
  • V. Vand

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Absorbers (Materials)
  • Advanced Materials
  • Amplitude
  • Crystal Structure
  • Crystals
  • Dislocations
  • Engineered Materials
  • Intensity
  • Materials
  • Mechanical Properties
  • Symmetry
  • Vibration
  • X Rays

Readers

  • Approximation Theory.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Materials Science and Engineering.

Technology Areas

  • Space