XAFS study of as in K-T boundary clays

Shunsuke Sakai; Akira Yoshiasa; Hiroshi Arima; Maki Okube; Chiya Numako; Tsutomu Sato

doi:10.1063/1.2644499

XAFS study of as in K-T boundary clays

Shunsuke Sakai, Akira Yoshiasa, Hiroshi Arima, Maki Okube, Chiya Numako, Tsutomu Sato

Materials Development Division

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

6 Citations (Scopus)

Abstract

Local structure around arsenic atoms in K-T boundary clays was studied by As K-edge XAFS spectroscopy. The threshold E₀ energy of As and the characterization of the white peak of XANES spectra agree well with the values of As(+5) minerals like Zn₂(AsO₄)₂(OH) ₂2H₂O and CaCu(AsO₄)(OH) according to the comparison with several types of arsenic minerals. This indicates that arsenic is in a high oxidation state As(+5) and occupies the AsO₄ tetrahedral site of a mineral in K-T boundary clays.

Original language	English
Title of host publication	X-RAY ABSORPTION FINE STRUCTURE - XAFS13
Subtitle of host publication	13th International Conference
Pages	274-276
Number of pages	3
DOIs	https://doi.org/10.1063/1.2644499
Publication status	Published - 2007 Mar 27
Event	X-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference - Stanford, CA, United States Duration: 2006 Jul 9 → 2006 Jul 14

Publication series

Name	AIP Conference Proceedings
Volume	882
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Other

Other	X-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference
Country	United States
City	Stanford, CA
Period	06/7/9 → 06/7/14

Keywords

As in K-T boundary clay
Chemical species of as
Local structure of as
XAFS of as minerals

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1063/1.2644499

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Sakai, S, Yoshiasa, A, Arima, H, Okube, M, Numako, C & Sato, T 2007, XAFS study of as in K-T boundary clays. in X-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference. AIP Conference Proceedings, vol. 882, pp. 274-276, X-RAY ABSORPTION FINE STRUCTURE - XAFS13: 13th International Conference, Stanford, CA, United States, 06/7/9. https://doi.org/10.1063/1.2644499

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title = "XAFS study of as in K-T boundary clays",

abstract = "Local structure around arsenic atoms in K-T boundary clays was studied by As K-edge XAFS spectroscopy. The threshold E0 energy of As and the characterization of the white peak of XANES spectra agree well with the values of As(+5) minerals like Zn2(AsO4)2(OH) 22H2O and CaCu(AsO4)(OH) according to the comparison with several types of arsenic minerals. This indicates that arsenic is in a high oxidation state As(+5) and occupies the AsO4 tetrahedral site of a mineral in K-T boundary clays.",

keywords = "As in K-T boundary clay, Chemical species of as, Local structure of as, XAFS of as minerals",

author = "Shunsuke Sakai and Akira Yoshiasa and Hiroshi Arima and Maki Okube and Chiya Numako and Tsutomu Sato",

year = "2007",

month = mar,

day = "27",

doi = "10.1063/1.2644499",

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series = "AIP Conference Proceedings",

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booktitle = "X-RAY ABSORPTION FINE STRUCTURE - XAFS13",

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T1 - XAFS study of as in K-T boundary clays

AU - Sakai, Shunsuke

AU - Yoshiasa, Akira

AU - Arima, Hiroshi

AU - Okube, Maki

AU - Numako, Chiya

AU - Sato, Tsutomu

PY - 2007/3/27

Y1 - 2007/3/27

N2 - Local structure around arsenic atoms in K-T boundary clays was studied by As K-edge XAFS spectroscopy. The threshold E0 energy of As and the characterization of the white peak of XANES spectra agree well with the values of As(+5) minerals like Zn2(AsO4)2(OH) 22H2O and CaCu(AsO4)(OH) according to the comparison with several types of arsenic minerals. This indicates that arsenic is in a high oxidation state As(+5) and occupies the AsO4 tetrahedral site of a mineral in K-T boundary clays.

AB - Local structure around arsenic atoms in K-T boundary clays was studied by As K-edge XAFS spectroscopy. The threshold E0 energy of As and the characterization of the white peak of XANES spectra agree well with the values of As(+5) minerals like Zn2(AsO4)2(OH) 22H2O and CaCu(AsO4)(OH) according to the comparison with several types of arsenic minerals. This indicates that arsenic is in a high oxidation state As(+5) and occupies the AsO4 tetrahedral site of a mineral in K-T boundary clays.

KW - As in K-T boundary clay

KW - Chemical species of as

KW - Local structure of as

KW - XAFS of as minerals

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