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

doi:10.1088/1742-6596/430/1/012070

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

Materials Development Division

Research output: Contribution to journal › Conference 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 language	English
Article number	012070
Journal	Journal of Physics: Conference Series
Volume	430
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/430/1/012070
Publication status	Published - 2013 Jan 1
Event	15th International Conference on X-Ray Absorption Fine Structure, XAFS 2012 - Beijing, China Duration: 2012 Jul 22 → 2012 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

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title = "XAFS study on Ca local structure in natural glasses and tektite",

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.",

author = "T. Tobase and L. Wang and A. Yoshiasa and M. Okube and T. Nakatani and Y. Hayasaka and H. Isobe",

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T1 - XAFS study on Ca local structure in natural glasses and tektite

AU - Tobase, T.

AU - Wang, L.

AU - Yoshiasa, A.

AU - Okube, M.

AU - Nakatani, T.

AU - Hayasaka, Y.

AU - Isobe, H.

PY - 2013/1/1

Y1 - 2013/1/1

N2 - 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.

AB - 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.

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