Structure and Phase Transitions in Bromine and Potassium-Mercury Intercalated Graphite,

Abstract

High resolution x-ray scattering and electron microscopy results relevant to the in-plane structure of two prototype graphite intercalation compound (GIC) systems, Br2-GIC and KHgx-GIC, are presented. Particular emphasis is given to intercalation kinetics and to structural coherence. Of special interest is the measurement using high resolution x-ray scattering of an intrinsic in-plane intercalate domain size in Br2-GIC larger than 10,000. Evidence is presented for the formation of a two-dimensional incommensurate domain wall structure for the Br2 intercalant along the 7-fold direction above T sub C = 69.08 C for stage 4 C28Br2. Evidence is also presented in the same compound for two-dimensional anisotropic melting at T sub M = 100.25 C. Large dislocation-free regions (100 a x 500 a) are observed directly in the lattice fringe images of a stage 1 KHg-GIC sample.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1983
Accession Number
ADA133863

Entities

People

  • A. Erbil
  • A. R. Kortan
  • G. Timp
  • M. S. Dresselhaus
  • Robert J. Birgeneau

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Crystals
  • Diffraction
  • Domain Walls
  • Electron Diffraction
  • Electron Microscopy
  • High Resolution
  • Materials
  • Materials Science
  • Measurement
  • Microscopes
  • Microscopy
  • Phase Transformations
  • Scattering
  • Two Dimensional
  • X Ray Scattering
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Physics

Readers

  • Image Processing and Computer Vision.
  • Materials Science and Engineering.
  • Molecular Photonics/Laser Physics

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene