Synthesis and Characterization of New Rare-Earth Metal-Main Group Metal Materials

这个项目的目的是研究材料合成的四个相互关联的领域，重点是为特定稀土金属主族金属材料制定相图。研究了稀土金属铜磷酸盐、四元稀土金属硫锑酸盐和铋酸盐、四元稀土金属硫三酸盐和四元稀土材料的四元相空间及其高压物理行为。一个假设将证明暗示产品的公式确实是有效的。在某些情况下，这些公式可以预测相关产物的空间群对称性。将探索相关材料的四元相图，以确定支持一系列硒磷酸盐的特定氧化态的相空间区域。在一系列矿物学研究的基础上，将研究其他目标公式，以探索如何控制相和结构。本文将对一系列稀土金属三铜酸盐和三铜酸盐进行四元相图的研究，其中三铜酸盐为镓和铟，四铜酸盐为锗和锡。金属硫化物类材料与催化光学器件（如激光器、红外探测器和太阳能电池）以及称为制冷热电材料的新材料等应用高度相关。

This project is aimed at the study of four interrelated areas of materials synthesis with an emphasis on developing phase maps for targeting specific rare-earth metal main group metal materials. The quaternary phase space of rare-earth metal chalcophosphates, quaternary rare-earth metal chalcoantimonates and bismuthates, and quaternary rare-earth metal chalcotrielates and tetrelates, and the high-pressure physical behavior of these materials will be investigated. One hypothesis will demonstrate that formulae suggesting products are indeed valid. These formulae, in some cases, can predict the space group symmetry of the related products. The quaternary phase diagrams of related materials will be explored to identity regions of phase space that support particular oxidation state of phosphorous for a series of selenophosphates. Based on a series of mineralogical studies, other target formulae will be investigated to explore how phases and structures may be controlled. Quaternary phase diagrams will be developed for a series of rare-earth metal chalcotrielates and chalcotetrelates, whether the triels will gallium and indium and there tetrels will germanium and tin.%%%The metal chalcogerides class of materials are highly relevant to applications that include catalysis optical deices such as lasers, infrared detectors, and solar cells, and as new materials called thermoelectrics for refrigeration.