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Title: Structure of TeO2 glass: Results from 2D 125Te NMR spectroscopy

Journal Article · · Journal of Non-Crystalline Solids
 [1];  [2];  [3];  [3];  [2];  [1]
  1. Univ. of California, Davis, CA (United States)
  2. Coe College, Cedar Rapids, IA (United States)
  3. National High Magnetic Field Laboratory, Tallahassee, FL (United States)

Despite its chemical simplicity, a definitive description of the structure of TeO2 glass has remained elusive due to the complexity of the Te-O coordination environment. Here, in this work we probe the Te-O coordination environment in glassy TeO2 using 2D 125Te isotropic-anisotropic chemical shift correlation nuclear magnetic resonance (NMR) spectroscopy. The NMR results are consistent with the presence of two Te-O environments in this glass, characterized by their distinct set of 125Te chemical shift parameters. The dominant environment (~89%) is a distorted trigonal bipyramidal TeO4 unit, reminiscent of that observed in crystalline γ-TeO2. A second, minor (~11%) component can be assigned, on the basis of its chemical shift parameters, to a TeO3 unit. Lastly, the resulting average coordination number, nTeO, measured by 125Te NMR (nTeO ≈ 3.9) is higher than its previously reported value obtained using neutron diffraction (nTeO ≈ 3.7).

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1543083
Alternate ID(s):
OSTI ID: 1636015
Report Number(s):
LLNL-JRNL-764461; 954482
Journal Information:
Journal of Non-Crystalline Solids, Vol. 513, Issue C; ISSN 0022-3093
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 23 works
Citation information provided by
Web of Science

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Cited By (1)

Features of electronic polarizability and approach to unique properties in tellurite glasses journal November 2019