Controlling oxygen coordination and valence of network forming cations.

ABSTRACT: Understanding the structure-property relationship of glass material is still challenging due to a lack of periodicity in disordered materials. Here, we report the properties and atomic structure of vanadium phosphate glasses characterized by reverse Monte Carlo modelling based on neutron/synchrotron X-ray diffraction and EXAFS data, supplemented by Raman and NMR spectroscopy. In vanadium-rich glass, the water durability, thermal stability and hardness improve as the amount of P₂O₅ increases, and the network former of the glass changes from VO_x polyhedra to the interplay between VO_x polyhedra and PO₄ tetrahedra. We find for the first time that the coordination number of oxygen atoms around a V⁴⁺ is four, which is an unusually

SUBMITTER: Aoyagi T 

PROVIDER: S-EPMC7188822 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature