Nature of Silicate Melts: Role of Highly Charged Cations

这个持续的研究项目将研究解决方案 高电荷阳离子在过碱性中的特性， 富硅熔体。 相 平衡，动力学和光谱技术将是 应用于铌、钽、钛、锡合金中铌、钽、钛、锡的研究 K_2 O-Na_2 O-Al_2 O_3-SiO_2-H_2O单斜花岗岩体系。 高- 温度显微拉曼光谱将用于 熔体微观结构研究研究的目标 是建立一个相互作用的层次结构， 带电阳离子与网络形成，网络修改，和 其他高度带电的阳离子，并检查相 高度演化的岩浆平衡，如高硅 流纹岩和伟晶岩。

This continuing research project will examine the solution characteristics of highly charged cations in peralkaline, metaluminous and peraluminous SiO2-rich melts. Phase equilibria, kinetic, and spectroscopic techniques will be applied to the study of Nb, Ta, Ti and Sn in the haplogranite system K2O-Na2O-Al2O3-SiO2-H2O. High- temperature micro-Raman spectroscopy will be used for the study of melt microstructure. The objectives of the research are to establish a hierarchy of interactions of these highly charged cations with network-forming, network-modifying, and other highly charged cations and to examine the phase equilibria of highly evolved magmas such as high silica rhyolites and pegmatites.