Abstract
This thesis introduces eleven indium silicates and seven palladium phosphates or arsenates which were obtained via high-temperature, high-pressure hydrothermal synthesis and flux-growth method. All of them are structurally determined by single-crystal X-ray diffraction. To get the quantity of products for physical measurements, we improved the synthesis condition or separated the crystals from impurity using microscope. The purity of these products was confirmed by the observed powder X-ray diffraction pattern in agreement with the calculated one based on the results from single-crystal X-ray diffraction. The properties of compounds were further characterized by different physical measurements respectively according to their structural features: the hydroxyl group by IR spectroscopy, the dehydration and thermal stability by TGA, the absence of a center of symmetry by second harmonic generation, the local environment of specific atom by solid state NMR, the magnetic behavior and ionic conductivity. All these compounds were divided into two series based on their metal centers. The A series (A1 to A11) represents indium silicates which adopt dissimilar microporous structures containing different cations or incorporating transition metals. The intriguing variety of silicate structures in A series includes single rings, chains, layers, and 3D frameworks. Some of these structural types make additions to the chemistry of silicates, especially the single silicate layers with the lowest ratio of Si:O. The B series (B1 to B7) includes three palladium phosphate and four palladium arsenates. Except B7, all their formulas could be symbolized by A2Pd3(X2O7)2 (A = K, Rb, Ag, Tl ; X = P or As). The only two building units, PdO4 and X2O7, construct three 3D frameworks and three 2D layer structures.