Crystal Structures and Crystal Chemistry of AgXPO4(X=Be, Zn)

Luminescent Properties of Silver(I) Diphosphate of Compositions Na2−xAgxZnP2O7

“…Figure 4 compares the experimental and calculated X-ray di!raction patterns. (9). The coordination number of the di!erent silver atoms is 8, and the silver oxygen distances are in accordance with those previously reported for several silver phosphates ( Table 4).…”

“…The modulation of the silver}oxygen bond covalence can be qualitatively deduced from detailed examination of the crystal structure. In this context the atomic arrangements of three silver zinc phosphates can be usefully compared, the polyphosphate AgZn(PO ) (14), the an forms of the monophosphate AgZnPO (9), and the diphosphate Ag ZnP O . The structure of these phosphates can be described as made up of a covalent oxygenated framework in which the silver atoms are located.…”

Crystal Structure of Na2ZnP2O7: Reinvestigation

“…In the case M>ZnPO monophosphates (M"Ag) (P/Zn"1) (13), the compounds belong to the large structural family of tridymite derivative with a three-dimensional covalent network made up of fully ordered [ZnO ] and [PO ] corner-sharing. The cations M> (Na>PCs>, Ag>, NH> ) are located in the large cavities created by the [ZnPO ] network with large coordination number (e.g., CN can reach 10 in -AgZnPO (13)). In the intermediate case of the sodium zinc diphosphate (P/Zn "2) the covalent network is two dimensional with full ordering between the [ZnO ] tetrahedra and the diphosphate groups.…”

Silver-gadolinium polytetraphosphate AgGd(PO3)4 synthesis, structural study, IR spectroscopy and conductivity investigation

“…The silver polyhedron is connected by common corners to (PO 3 ) n chains and by common faces to gadolinium dodecahedra with Gd-Ag distance of 3.635(1)Å. By comparison of the coordination number around Ag cations in the alpha and beta forms of AgZnPO 4 [27], it can be noted that this number increase to reach 12 in some cases. This consideration is usually related to the bond-valence sums.…”