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@ARTICLE{Hoppe:420926,
      author       = {Hoppe, U. and Brow, R. K. and Hannon, A. C. and von
                      Zimmermann, Martin},
      title        = {{S}tructure of tin phosphate glasses by neutron and {X}-ray
                      diffraction},
      journal      = {Journal of non-crystalline solids},
      volume       = {2},
      issn         = {0022-3093},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {PUBDB-2019-01769},
      pages        = {100017},
      year         = {2019},
      abstract     = {Neutron and X-ray diffraction experiments with large ranges
                      of scattering vector, up to Q$_{max}$ of 400 nm$^{−1}$
                      and 250 nm$^{−1}$, respectively, were performed on
                      (SnO)$_x$(P$_2$O5)$_{1-x}$ glasses with
                      0.5 ≤ x ≤ 0.7, and the structural parameters of
                      the PO and SnO polyhedra were determined. The fraction of
                      P–NBO (non-bridging oxygen) bonds increases systematically
                      at the expense of the P–BO (bridging oxygen) bonds with
                      SnO additions. The SnO coordination number decreases in a
                      predictable way from four at the metaphosphate composition
                      (x = 0.5) to about three at the diphosphate composition
                      (x = 0.67). The structural units are assumed to be
                      SnO$_4$ trigonal bipyramids and SnO$_3$ trigonal pyramids
                      with the lone-pair of Sn(II) electrons occupying one of the
                      corners, similar to those in related crystal structures. For
                      all glasses up to x = 0.67, the SnOz pyramids and PO$_4$
                      tetrahedra form a continuous network with POP and POSn bonds
                      and the SnO polyhedra do not share oxygen neighbors. From
                      comparisons of the compositional dependences of the SnO and
                      ZnO coordination numbers and the respective number densities
                      of atoms in the binary tin and zinc phosphate glasses, it is
                      presumed that the SnO coordination increases further with
                      N$_{SnO}$ > 4 in the ultraphosphate range
                      (x < 0.5).},
      cin          = {FS-PEX},
      ddc          = {670},
      cid          = {I:(DE-H253)FS-PEX-20130206},
      pnm          = {6214 - Nanoscience and Materials for Information Technology
                      (POF3-621)},
      pid          = {G:(DE-HGF)POF3-6214},
      experiment   = {EXP:(DE-H253)D-BW5-20150101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1016/j.nocx.2019.100017},
      url          = {https://bib-pubdb1.desy.de/record/420926},
}