Silver Hydro Sodalite [Ag3(H2O)4]2[Al3Si3O12]2: Synthesis and Structure Determination by Combination of X-ray Rietveld Refinement, Thermogravimetry, FT-IR, and 1H-MAS NMR Spectroscopy

摘要: Sodium hydro sodalite [Na3(H2O)4]2[Al3Si3O12]2 was subjected to ion exchange with aqueous AgNO3 solutions yield silver [Ag3(H2O)4]2[Al3Si3O12]2. A Rietveld structure refinement of the based on powder X-ray diffraction data recorded at room temperature (cubic, a = 8.950 A, space group P-43n) led model where three cations form triangle nearly parallel four-membered ring cage. In combination four water molecules, disorder [Ag3(μ-H2O)2(H2O)2]3+ is suggested. This structural arrangement clearly different from that found in sodium sodalite. Whereas dominated by cation−water interactions, reflects strong interactions between and oxygen atoms framework, but only weak ones molecules. addition, Ag+···Ag+ may play role. 1H MAS NMR spectra show hydrogen (which were not analysis) molecules are involved bonding strengths dynamics.