Disorder and Dynamics in Silicate and Aluminosilicate Liquids, Glasses, and Crystals Relevant to Geochemical Processes: Nuclear Magnetic Resonance Studies

该项目的总体目标是更好地了解并最终能够预测最终控制涉及结晶、玻璃和熔融硅酸盐材料的复杂地质过程的热力学和运输性质。研究中所采用的方法是找出需要中短程结构的关键细节并且可以通过光谱学来阐明的重要问题，在适当简化的系统中进行准确的测量，并确定结果对基本参数的影响，如构型熵、自由能、组分活度、扩散系数和粘度。主要的研究工具将继续是固态核磁共振(核磁共振)，这对于测量硅酸盐和氧化物中无序和动力学的程度和性质特别有用。这项研究将是几名博士生科学培训的关键部分，并与材料科学、物理化学和无序系统物理学等其他领域有着密切的联系。

The overall goal of this project is to better understand, and eventually to be able to predict, the thermodynamic and transport properties that ultimately control complex geological processes involving crystalline, glassy and molten silicate materials. The approach taken in the proposed research is to identify important problems where critical details of short- to intermediate-range structure are needed and can be elucidated by spectroscopy, make accurate measurements in appropriately simplified systems, and determine the consequences of the results for fundamental parameters such as configurational entropy, free energy, component activities, diffusivity, and viscosity. The primary research tool will continue to be solid-state Nuclear Magnetic Resonance (NMR), which is particularly useful for measuring the extent and nature of disorder and dynamics in silicates and oxides. This research will be a critical part of the scientific training of several Ph.D. students, and has close ties to other fields such as materials science, physical chemistry, and the physics of disordered systems.