RUI; Solution Calorimetric, Crystallographic, and Phase Equilibria Investigations of the Thermodynamic Properties of Minerals

这是以前由美国国家科学基金会资助的EAR83-19084研究的继续，涉及通过溶液量热法直接确定重要矿物的热力学性质。这项研究将在白云母-云母、霞石-方解石-白榴石中产生与化学取代相关的过量热和体积。将测定共沸石和方钠铝石的生成热焓。与应变相关的热变将在隐沸石中测量。通过将量热结果与相平衡研究的数据相结合，将在碱性长石中计算超额熵。拟议的项目以前从未尝试过，因此将产生关于这些矿物的新数据。

This is a continuation of research previously supported by NSF grant EAR83-19084, involving the direct determination of thermodynamic properties of important minerals by solution calorimetry. The research will yyield excess enthalpies and volumes associated with chemical substitution in muscovite- paragonite micas, nepheline- analcite-leucite. Enthalpies of formation will be determined for paragonite and sodalite. Enthalpy changes associated with strain will be measured in crypto-perthites. Excess entropies will be formulated in alkali feldspars by combining calorimetric results with data from phase equilibrium studies. The proposed projects have not been attempted previously and thus will lead to new data on these minerals.