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Structure of praseodymium and neodymium gallate glasses

Authors
Journal
Journal of Non-Crystalline Solids
0022-3093
Publisher
Elsevier
Publication Date
Volume
357
Issue
14
Identifiers
DOI: 10.1016/j.jnoncrysol.2010.12.058
Keywords
  • Glass Structure
  • Neutron Diffraction
  • Aerodynamic Levitation

Abstract

Abstract The rare-earth gallate glasses R 4Ga 6O 15, where R denotes Pr or Nd, were prepared using an aerodynamic levitator and laser heating system. The structure was studied by applying the method of isomorphic substitution in neutron diffraction which allows for an identification of the gallium and rare-earth coordination environments. The results give a mean Ga–O coordination number of 4.2(1) at a distance of 1.85(2) Å and a mean R–O coordination number of 7.4(2) at a mean distance of 2.38(2) Å. The experimental results are consistent with a glass network built from GaO 4 tetrahedra and with the presence of GaO 6 octahedra at the 10(5)% level.

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