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Versatile in situ powder X-ray diffraction cells for solid-gas investigations

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Author

  • Torben R. Jensen
  • Thomas K. Nielsen
  • Yaroslav Filinchuk
  • Jens-Erik Jorgensen
  • Yngve Cerenius
  • Evan MacA Gray
  • Colin J. Webb

Summary, in English

This paper describes new sample cells and techniques for in situ powder X-ray diffraction specifically designed for gas absorption studies up to ca 300 bar (1 bar = 100 000 Pa) gas pressure. The cells are for multipurpose use, in particular the study of solid-gas reactions in dosing or flow mode, but can also handle samples involved in solid-liquid-gas studies. The sample can be loaded into a single-crystal sapphire (Al2O3) capillary, or a quartz (SiO2) capillary closed at one end. The advantages of a sapphire single-crystal cell with regard to rapid pressure cycling are discussed, and burst pressures are calculated and measured to be similar to 300 bar. An alternative and simpler cell based on a thin-walled silicate or quartz glass capillary, connected to a gas source via a VCR fitting, enables studies up to similar to 100 bar. Advantages of the two cell types are compared and their applications are illustrated by case studies.

Department/s

Publishing year

2010

Language

English

Pages

1456-1463

Publication/Series

Journal of Applied Crystallography

Volume

43

Document type

Journal article

Publisher

International Union of Crystallography

Topic

  • Natural Sciences
  • Physical Sciences

Keywords

  • solid-gas reactions
  • powder X-ray diffraction
  • X-ray diffraction cells
  • hydrogen absorption

Status

Published

ISBN/ISSN/Other

  • ISSN: 1600-5767