English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The local structural environment and the spatial distribution of iron andaluminum ions in sodosilicate glasses with composition NaFexAl1-xSi2O6 (x = 1,0.8, 0.5 and 0) is studied by high-resolution neutron diffraction combined withstructural modeling using the Empirical Potential Structure Refinement (EPSR)code. This work gives evidence of differences in the structural behavior ofAl3+ and Fe3+, which are both often considered to act as network formers incharge-balanced compositions. The short-range environment and the structuralrole of the two cations are not composition dependent, and hence the structureof intermediate glasses can then be seen as a mixture of the structures of thetwo end-members. All Al3+ is 4-coordinated for a distanced[4]Al3+-O=1.76$\pm$0.01{\AA}. The high-resolution neutron data allowsdeciphering between two populations of Fe. The majority of Fe3+ is4-coordinated (d[4]Fe3+-O=1.87$\pm$0.01{\AA}) while the remaining Fe3+ and allFe2+ (~12% of total Fe) are 5-coordinated (d[5]Fe-O=2.01$\pm$0.01{\AA}). BothAlO4 and FeO4 are randomly distributed and connected with the silicate networkin which they share corners with SiO4 tetrahedra, in agreement with anetwork-forming role of those species. On the contrary FeO5 tends to formclusters and to share edges with each other. 5-coordinated Fe is interpreted asnetwork modifier and it turns out that, even if this coordination number israre in crystals, it is more common in glasses in which they can have a keyrole on physical properties.

Intermediate range order in (Fe,Al) silicate network glasses: a neutron diffraction and EPSR modeling investigation