Structure of Vitreous KPO_3 Studied by Neutron and X-Ray Diffraction

摘要

The gain of information about the glass structure obtained by RMC simulations on the basis of neutron and X-ray diffraction results is demonstrated by vitreous KPO_3. Details of the first neighbour P-O peak confirm the existence of ring and chain structures which are formed from two-fold linked PO_4 units. The separation distance of these anionic molecular structures is determined by the dimension of the large K~+ cations. The mutual arrangements of the modifier cations in their oxygen polyhedra form an interpenetrating substructure which surrounds the various forms of linked PO_4 tetrahedra.