X-Ray Diffraction Studies of the Role of Hydrogen Bonding in the Low Temperature Behavior of Materials

Abstract

X-Ray Diffraction strip chart recordings were obtained at 100K and 300K for powder samples of urea and seven carbohydrates. A combination of known crystallographic data and a least squares fit program revealed the temperature dependence of the unit cell for urea and three of the carbohydrates. In all cases, a contraction on cooling was observed. While the volume of data produced did not justify any positive conclusions, the results did not contradict the model of Sklar et al assigning the entire shrinkage to hydrogen bond contraction. The model remains valid for interpretation of infrared data, at least until further x-ray data becomes available.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1971
Accession Number
AD0740588

Entities

People

  • Henry A. Wells
  • Mark A. Goldschmidt

Organizations

  • University of Dayton

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Carbohydrates
  • Contracts
  • Crystal Structure
  • Diffraction
  • Government Procurement
  • Governments
  • Hydrogen Bonds
  • Low Temperature
  • Materials
  • Materials Laboratories
  • Spectra
  • Standards
  • Sugars
  • Vibrational Spectra
  • X Rays
  • X-Ray Diffraction

Readers

  • Organic Chemistry
  • Regression Analysis.
  • Thermal Physics or Thermal Science.