Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 149, Issue 2, Pages 284-291Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1006/jssc.1999.8528
Keywords
diphosphate; rietveld; luminescence; silver; pairs
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The luminescence of silver(I) ions was investigated in diphosphate of compositions Na2-xAgxZnP2O7. The [P2O7] groups share corners with [ZnO4] tetrahedra in a layer arrangement. The Na/Ag atoms are located between layers in distorted oxygenated cubic sites sharing faces-with short intermetallic distances-or edges. Two luminescent centers were detected and attributed, respectively, to single Ag+ and Ag+-Ag+ pairs. The luminescent parameters are discussed with respect to the symmetry of the silver sites and of the ionocovalent character of the silver oxygen bonds. (C) 2000 Academic Press.
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