Experimental Geochemistry of Rock-Forming Minerals

9310264牛顿这个项目是研究许多不同的主要矿物的热力学稳定性，包括硅酸盐，氧化物，水合物和碳酸盐。 所获得的数据对于建立计算天然矿物组合稳定性的热力学数据集至关重要。 重点将放在热力学性质仍不确定的重要矿物种类上。 由于自洽数据集中矿物性质的相互依赖性，插入关键矿物的精确测量的自由能、熵和熵将迫使数据集中大多数其他矿物的热力学参数发生变化。 对几个重要矿物族的固溶体自由能数据进行了测定。 使用的方法是在高温高压下进行简单系统相平衡测量，包括在单组分或混合汽相存在下和使用聚离子氧化物熔体进行的实验，以及溶液量热法。 地球过程的非均质平衡计算能力的重大改进将来自关键石榴石、辉石、晶石、云母和碳酸盐矿物的热力学形成和固溶体性质的准确定义。

9310264 Newton This project is to investigate the thermodynamic stabilities of many different major minerals, including silicates, oxides, hydrates and carbonates. The data to be acquired are of crucial importance to the erection of thermodynamic datasets for calculation of the stabilities of natural mineral assemblages. The concentration will be on important mineral species whose thermodynamic properties are still uncertain. Because of the interdependent nature of mineral properties in the self-consistent datasets, insertion of accurately-measured free energies, enthalpies and entropies of key minerals will force changes of the thermodynamic parameters of most of the other minerals of the datasets. Free energy data of solid solution will be measured for several important mineral families. Methods to be used are simple-system phase equilibrium measurements at elevated temperatures and pressures, including experiments in the presence of a single-component or mixed vapor phase and with polyionic oxide melts, and solution calorimetry. Major improvement in the ability to calculate heterogeneous equilibria of earth processes will result from accurate definition of the thermodynamic formation and solid solution properties of key garnets, pyroxenes, feldspars, micas and carbonate minerals.