Local Environment of Strontium Ions in Borosilicate and Aluminophosphate Glassesстатья
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Дата последнего поиска статьи во внешних источниках: 4 сентября 2018 г.
Аннотация:Parameters of the local environment of the Sr2+ ions in borosilicate glasses with a high
level waste surrogate were determined by analyzing the of X-ray absorption fine structure spectra.
It is found that the Sr2+ ions mostly have an oxygen environment with a trigonal bipyramidal
configuration; the average Sr–O dis- tance in the first coordination shell is about 2.53–2.54 Å.
The second coordination shell of strontium in the glasses is weak; the nearest neighboring atom is
located at a distance of 3.55–3.58 Å. In the structure of all the studied glasses, the first coordination shell of strontium is split into two subshells because of a distortion of the
coordination polyhedron, while the second and subsequent coordination shells become apparent upon
an increase in the SrO concentration.