Physics
Scientific paper
Apr 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007njph....9...88s&link_type=abstract
New Journal of Physics, Volume 9, Issue 4, pp. 88 (2007).
Physics
3
Scientific paper
Extended x-ray absorption fine structure (EXAFS) measurements have been performed at the K edge of iodine in (AgI)1-y(Ag2MoO4)y glasses, with y = 0.25 and 0.33, as a function of temperature from 25 K to the glass transition temperature Tgsime 323 K. EXAFS monitors the short-range component of the I Ag distance distribution. At 25 K, iodine coordinates to about four silver ions, at an average distance about 0.06 Å larger than in β-AgI. As temperature increases, EXAFS monitors a progressive depletion of the short-range distribution, due to transitions of Ag ions into a long-range component. Coordination number and mean value of the short-range I Ag distribution decrease while temperature is increasing. EXAFS results give information on the local modifications around iodine due to the ionic diffusivity.
Dalba G.
Fornasini P.
Grisenti R.
Rocca Fabio
Sanson A.
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