Local structure analysis around Kr in minerals by XAFS

Maki Okube, Akira Yoshiasa, Takuya Matsumoto, Eiji Ito, Yasuko Terada

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In order to investigate reactivity of noble gas (Kr) in minerals, several kinds of Kr-doped minerals were synthesized under high pressures and temperatures and were subjected to mass spectroscopy and XAFS. We observed that some Kr trapped in the samples was retained in the samples at temperatures above 1000 °C. Interestingly, the atomic distances between Kr and neighboring atoms derived from XAFS analysis appeared to be shorter than the distances expected for the case of simple adsorption. These results suggest that Kr might be bound in the samples with interaction stronger than the adsorption and/or exist in the internal sites of the structure of the host minerals (not in a grain boundary as is often presumed).

Original languageEnglish
Title of host publicationX-RAY ABSORPTION FINE STRUCTURE - XAFS13
Subtitle of host publication13th International Conference
Number of pages3
Publication statusPublished - 2007
EventX-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference - Stanford, CA, United States
Duration: 2006 Jul 92006 Jul 14

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


OtherX-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference
Country/TerritoryUnited States
CityStanford, CA


  • High-pressure and high-temperature
  • Mass spectroscopy
  • Minerals
  • Noble gas
  • XAFS

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science
  • Physics and Astronomy(all)
  • Nature and Landscape Conservation


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