RELATION OF MECHANICAL PROPERTIES TO THE STRUCTURE OF IONIC SOLIDS

Abstract

The crystal structures of KMg3AlSi3O10F2 and BaLiMg2AlSi3O10F2 were refined by least squares analysis of x-ray diffraction intensities. It is shown that the hardness, thermal stability and chemical resistance of various micas are related primarily to the interlayer structure and the amount of ditrigonal distortion. Making use of Lang's x-ray topographic technique, partial dislocations were photographed in muscovite mica. This is the first time partial dislocations have been observed in mica. The various mechanical properties and the origin of the coarse corrugations which are often observed in muscovite have been explained in terms of the above partial dislocations.

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Document Details

Document Type
Technical Report
Publication Date
Aug 20, 1969
Accession Number
AD0699841

Entities

People

  • J. L. Caslavsky
  • J. W. Mccauley
  • K. Vedam
  • Robert E. Newnham

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Crystal Structure
  • Crystals
  • Diffraction
  • Diseases And Disorders
  • Dislocations
  • Distortion
  • Equations
  • Materials
  • Mechanical Properties
  • Mechanics
  • Minerals
  • Modulus Of Elasticity
  • Phyllosilicates
  • Silicates
  • Thermal Stability
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.