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

这项研究将包括对硅酸盐熔体、玻璃和晶体的结构和动力学的研究计划的继续。主要的实验方法将是核磁共振（NMR）光谱和弛豫测量，但也将使用各种新的核磁共振方法。这项研究的一个不同寻常的方面将继续是核磁共振光谱，温度高达1400至1600摄氏度。本研究计划的总体目标是提供硅酸盐矿物中无序的原子尺度性质的定量数据，以及这种无序如何产生的动力学，以便更好地约束宏观性质的模型，如自由能、熵、粘度和扩散率，强调那些对地质过程最重要的模型。

9506393 Stebbins This research will involve continuation of a research program on the structure and dynamics of silicate melts, glasses and crystals. The primary experimental approach will be nuclear magnetic resonance (NMR) spectroscopy and relaxation measurements, but a variety of new NMR methods will also be used. An unusual aspect of this research will continue to be NMR spectroscopy at temperatures as high as 1400 to possibly 1600oC. The general objective of this research plan is to provide quantitative data on the atomic-scale nature of disorder in silicate minerals and the dynamics of how this disorder is produced, in order to better constrain models of macroscopic properties such as free energy, entropy, viscosity, and diffusivity, emphasizing those which are most important for eeological processes.