Structural Studies of Hydrogarnet and Vesuvianite

该项目涉及几个晶体结构分析 水石榴子石和相关矿物vesuvianite的组成。 天然钛钙铁榴石的单晶中子衍射研究 和火山岩将进行确定的位置， H原子的环境。 维苏威火山与许多 水石榴石，在某些情况下，显示红外光谱 与水石榴石非常相似。 分析这一结构， 类似石榴石的矿物可以提供关于 水石榴石中H取代的性质。 的结果予以 研究将提供对晶体化学因素的深入了解 控制着天然水石榴石的“稳定性”， 它们存在于许多重要的岩石类型中。

This project involves the crystal-structural analysis of several compositions of hydrogarnet and the related mineral vesuvianite. Single-crystal neutron-diffraction studies of natural Ti-andradite and vesuvianite will be carried out to determine the position and environment of the H atom. Vesuvianite is intergrown with many hydrogarnets and, in some cases, exhibits an infrared spectrum very similar to hydrogarnet. Analysis of the structure of this garnet-like mineral may provide additional information on the nature of the H substitution in hydrogarnet. The results of these studies will provide insights into the crystal-chemical factors which govern the "stability" of natural hydrogarnets, minerals which occur in a number of important rock types.