Title: Zinc K -edge XANES spectroscopy of mineral and organic standards

Abstract

Zinc K -edge X-ray absorption near-edge (XANES) spectroscopy was conducted on 40 zinc mineral samples and organic compounds. The K -edge position varied from 9660.5 to 9666.0 eV and a variety of distinctive peaks at higher post-edge energies were exhibited by the materials. Zinc is in the +2 oxidation state in all analyzed materials, thus the variations in edge position and post-edge features reflect changes in zinc coordination. For some minerals, multiple specimens from different localities as well as pure forms from chemical supply companies were examined. These specimens had nearly identical K -edge and post-edge peak positions with only minor variation in the intensity of the post-edge peaks. This suggests that typical compositional variations in natural materials do not strongly affect spectral characteristics. Organic zinc compounds also exhibited a range of edge positions and post-edge features; however, organic compounds with similar zinc coordination structures had nearly identical spectra. Zinc XANES spectral patterns will allow identification of unknown zinc-containing minerals and organic phases in future studies.

Authors:

Griffith, Erin K. ;

• Search DOE PAGES for author "Griffith, Erin K."
• Search DOE PAGES for ORCID "0000-0001-5698-1432"

Ingall, Ellery D. ;

• Search DOE PAGES for author "Ingall, Ellery D."
• Search DOE PAGES for ORCID "0000-0003-1954-0317"

Morton, Peter L. ;

• Search DOE PAGES for author "Morton, Peter L."
• Search DOE PAGES for ORCID "0000-0002-4248-2357"

Tavakoli, David A. ;

• Search DOE PAGES for author "Tavakoli, David A."
• Search DOE PAGES for ORCID "0000-0002-6638-1032"

Lai, Barry

• Search DOE PAGES for author "Lai, Barry"
• Search DOE PAGES for ORCID "0000-0002-6061-7155"

Publication Date:

Fri Jun 21 00:00:00 EDT 2019

Research Org.:

Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Org.:

USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)

OSTI Identifier:

1960452

Alternate Identifier(s):

OSTI ID: 1572202

Grant/Contract Number:  

AC02-06CH11357

Resource Type:

Published Article

Journal Name:

Journal of Synchrotron Radiation (Online)

Additional Journal Information:

Journal Name: Journal of Synchrotron Radiation (Online) Journal Volume: 26 Journal Issue: 4; Journal ID: ISSN 1600-5775

Publisher:

International Union of Crystallography (IUCr)

Country of Publication:

Denmark

Language:

English

Subject:

36 MATERIALS SCIENCE; XANES; Zn K-edge; spectroscopy; zinc standards