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

In English

Författare

  • 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.

Publiceringsår

2010

Språk

Engelska

Sidor

1456-1463

Publikation/Tidskrift/Serie

Journal of Applied Crystallography

Volym

43

Dokumenttyp

Artikel i tidskrift

Förlag

International Union of Crystallography

Ämne

  • Natural Sciences
  • Physical Sciences

Nyckelord

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

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1600-5767