XAFS study on Ca local structure in natural glasses and tektite

T. Tobase, L. Wang, A. Yoshiasa, M. Okube, T. Nakatani, Y. Hayasaka, H. Isobe

Research output: Contribution to journalConference article

4 Citations (Scopus)

Abstract

The local structures of tektite and natural glasses were studied by Ca K-edge X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) in order to provide quantitative data on bonding distances and coordination numbers. The pre-edge peak intensities of tektites are 10.7-11.7%, and those of peudotachylite, Kirauea volcanic glass, impactite, pitchstone and perlite are 6.7-10.9%. The main peak shoulder intensities of tektites are 68.3-70.7%, and other natural glasses are 63.0-63.9%. XAFS analysis indicated all tektites possess 7-coordinated Ca, but natural glasses possess 6-, 7- and 8- coordinated Ca. This study indicated that different petrogenesis of natural glasses gives different local structures of calcium.

Original languageEnglish
Article number012070
JournalJournal of Physics: Conference Series
Volume430
Issue number1
DOIs
Publication statusPublished - 2013 Jan 1
Event15th International Conference on X-Ray Absorption Fine Structure, XAFS 2012 - Beijing, China
Duration: 2012 Jul 222012 Jul 28

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Tobase, T., Wang, L., Yoshiasa, A., Okube, M., Nakatani, T., Hayasaka, Y., & Isobe, H. (2013). XAFS study on Ca local structure in natural glasses and tektite. Journal of Physics: Conference Series, 430(1), [012070]. https://doi.org/10.1088/1742-6596/430/1/012070