Disorder and Dynamics in Silicate Liquids, Glasses, and Crystals: Nuclear Magnetic Resonance Studies

本项目是对硅酸盐液体、玻璃和晶体的结构和无序动力学研究的延续和扩展，使用核磁共振（NMR）波谱技术。这项工作的主要目的是更好地理解无序材料的热力学和输运性质的基本原理，特别是构型熵、密度、粘度和扩散率，以便更准确地推断出自然界中存在的压力、温度和时间条件。核磁共振将用于研究高温液体及其玻璃等效物中具有地球化学意义的阳离子和阴离子O周围的局部和中间范围结构。我们将特别关注温度和压力对Si、Al和o配位数的影响。对结晶固体的继续研究将有助于校准和理解在玻璃和液体中的观察结果。

This project is for the continuation and extension of research on the structure and dynamics of disordering in silicate liquids, glasses, and crystals, using nuclear magnetic resonance (NMR) spectroscopy. The major objective of this work is to better understand the fundamentals of the thermodynamic and transport properties of disordered materials, particularly configurational entropy, density, viscosity, and diffusivity, in order to more accurately extrapolate to conditions of pressure, temperature, and time found in nature. NMR will be used to study the local and intermediate range structure around geochemically significant cations, and the anion O, in liquids at high temperature and in their glassy equivalents. Particular attention will be paid to the effects of temperature and pressure on coordination numbers of Si, Al, and O. Continue studies of crystalline solids will be used to help calibrate and understand observations in glasses and liquids.