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 articlepeer-review

4 Citations (Scopus)


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
Issue number1
Publication statusPublished - 2013
Externally publishedYes
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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