RUI: Energies of Mineral and Rock Processes

拉斐特学院的溶液量热实验室HovisEAR-0000523致力于研究具有重要地质意义的物质的热力学性质和行为。在授权期内，将在简单体系中研究玻璃/液体的能量学，以便将已建立的不混溶程度与混合热联系起来，并建立组态熵模型，以检验由粘度数据发展的Adams-Gibbs模型的有效性。沸石将是第一批被量热法研究的非晶态硅酸盐，研究的主要目的是了解这些材料的基本性质，它们与热非晶化类似物的差异，以及非晶态材料中“水”的行为。目前正在进行的对长英质含水岩浆系统的研究将完成，将产生有关含水岩浆热收支的信息，并在光谱数据的背景下量化物种形成的能量学。将测量K-Rb和其他长石系统的混合能，以期建立广义混合模型。方解石-坡绿石和方解石-Rb-白榴石体系的碱-水-空位耦合取代热的测量将会结束。高硅霞石-钾硅石的临界温度将被确定，以努力将K-Na混合性质与相行为联系起来。将开始对卤化物矿物中与微结构有关的能量进行定量研究。其中一些项目将涉及与美国、英国、法国和德国科学家的合作努力。已经专门为本科生制定了几个项目，其中包括一个关于霞石-钾硅石矿物热膨胀的项目。这些项目将向学生传授科学研究的方法、哲学和重要性。

HovisEAR-0000523The Solution Calorimetry Laboratory at Lafayette College engages in the investigation of the thermodynamic properties and behavior of geologically significant materials. During the grant period the energetics of glasses/liquids will be investigated in simple systems in order to relate established immiscibility to enthalpies of mixing and to develop configurational entropy models that will test the validity of Adams-Gibbs models developed from viscosity data. Zeolites will be the first amorphized silicates to be investigated calorimetrically, the primary objects of the study being to understand fundamental nature of these materials, their differences from thermally amorphized analogs, and the behavior of "water" in amorphous materials. An ongoing study of felsic water-bearing magmatic systems will be brought to conclusion, yielding information on the thermal budgets of hydrous magmas and quantifying the energetics of speciation in the context of spectroscopic data. Mixing energies will be measured for K-Rb and other feldspar systems in the hope of developing generalized mixing models. Measurement of enthalpies associated with alkali-water-vacancy coupled substitution will be concluded for the analcime - pollucite and analcime - Rb-leucite systems. The critical temperature of high-Si nepheline - kalsilite will be determined in an effort to connect K-Na mixing properties to phase behavior. A quantitative study of energies associated with microstructures in halide minerals will be initiated. A number of these projects will involve collaborative efforts with scientists in the United States, the United Kingdom, France, and Germany. Several projects, including one on the thermal expansion of nepheline - kalsilite minerals, have been developed specifically for undergraduate participation. These projects will teach students about the methods, philosophy, and importance of scientific research.