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Title: Local Structure of Cerium in Aluminophosphate and Silicophosphate Glasses

Abstract

The local structure of cerium in two systematic compositional series of glasses, nominally CeP{sub 3}O{sub 9}-AlP{sub 3}O{sub 9} and CeP{sub 3}O{sub 9}-SiP{sub 2}O{sub 7}, was interrogated using X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) spectroscopy. XPS revealed that, for glasses melted in air, {>=}95% of cerium ions are Ce{sup 3+}. This was independently confirmed using X-ray absorption near edge spectroscopy (XANES). Ce K-edge extended X-ray absorption fine structure (EXAFS) has been used to determine the local structure of Ce{sup 3+}. Near the metaphosphate composition, cerium was found to have an average cerium coordination number of {approx}7.0 and an average cerium-oxygen bond length of 2.41 {angstrom}. The average cerium coordination number and average cerium-oxygen bond distance were found to increase with decreasing cerium concentration in both compositional series. Rare-earth clustering is suggested based on numerical calculations for glasses containing {>=}14 and {>=}15 mol% Ce{sub 2}O{sub 3} for the aluminophosphate and silicophosphate series, respectively.

Authors:
; ; ; ; ; ; ;  [1]
  1. IIT
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
NSFAFR
OSTI Identifier:
1023662
Resource Type:
Journal Article
Journal Name:
J. Am. Ceram. Soc.
Additional Journal Information:
Journal Volume: 94; Journal Issue: (8) ; 08, 2011; Journal ID: ISSN 0002-7820
Country of Publication:
United States
Language:
ENGLISH
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ABSORPTION SPECTROSCOPY; ALUMINIUM PHOSPHATES; BOND LENGTHS; CERIUM; CERIUM IONS; COORDINATION NUMBER; FINE STRUCTURE; GLASS; PHOSPHATES; PHOSPHATE GLASS; SILICON PHOSPHATES; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Rygel, Jennifer L, Chen, Yongsheng, Pantano, Carlo G, Shibata, Tomohiro, Du, Jincheng, Kokou, Leopold, Woodman, Robert, Belcher, James, InfoSciTex), UNT), and Penn). Local Structure of Cerium in Aluminophosphate and Silicophosphate Glasses. United States: N. p., 2011. Web. doi:10.1111/j.1551-2916.2011.04596.x.
Rygel, Jennifer L, Chen, Yongsheng, Pantano, Carlo G, Shibata, Tomohiro, Du, Jincheng, Kokou, Leopold, Woodman, Robert, Belcher, James, InfoSciTex), UNT), & Penn). Local Structure of Cerium in Aluminophosphate and Silicophosphate Glasses. United States. https://doi.org/10.1111/j.1551-2916.2011.04596.x
Rygel, Jennifer L, Chen, Yongsheng, Pantano, Carlo G, Shibata, Tomohiro, Du, Jincheng, Kokou, Leopold, Woodman, Robert, Belcher, James, InfoSciTex), UNT), and Penn). 2011. "Local Structure of Cerium in Aluminophosphate and Silicophosphate Glasses". United States. https://doi.org/10.1111/j.1551-2916.2011.04596.x.
@article{osti_1023662,
title = {Local Structure of Cerium in Aluminophosphate and Silicophosphate Glasses},
author = {Rygel, Jennifer L and Chen, Yongsheng and Pantano, Carlo G and Shibata, Tomohiro and Du, Jincheng and Kokou, Leopold and Woodman, Robert and Belcher, James and InfoSciTex) and UNT) and Penn)},
abstractNote = {The local structure of cerium in two systematic compositional series of glasses, nominally CeP{sub 3}O{sub 9}-AlP{sub 3}O{sub 9} and CeP{sub 3}O{sub 9}-SiP{sub 2}O{sub 7}, was interrogated using X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) spectroscopy. XPS revealed that, for glasses melted in air, {>=}95% of cerium ions are Ce{sup 3+}. This was independently confirmed using X-ray absorption near edge spectroscopy (XANES). Ce K-edge extended X-ray absorption fine structure (EXAFS) has been used to determine the local structure of Ce{sup 3+}. Near the metaphosphate composition, cerium was found to have an average cerium coordination number of {approx}7.0 and an average cerium-oxygen bond length of 2.41 {angstrom}. The average cerium coordination number and average cerium-oxygen bond distance were found to increase with decreasing cerium concentration in both compositional series. Rare-earth clustering is suggested based on numerical calculations for glasses containing {>=}14 and {>=}15 mol% Ce{sub 2}O{sub 3} for the aluminophosphate and silicophosphate series, respectively.},
doi = {10.1111/j.1551-2916.2011.04596.x},
url = {https://www.osti.gov/biblio/1023662}, journal = {J. Am. Ceram. Soc.},
issn = {0002-7820},
number = (8) ; 08, 2011,
volume = 94,
place = {United States},
year = {Tue Sep 20 00:00:00 EDT 2011},
month = {Tue Sep 20 00:00:00 EDT 2011}
}