Structural Studies of Hydrogarnet and Vesuvianite

该项目涉及水化石榴石和相关矿物泡沫石的几种成分的晶体结构分析。为了确定氢原子的位置和环境，将对天然钛闪锌矿和钠钛矿进行单晶中子衍射研究。Vesuvianite与许多水石榴石共生，在某些情况下，表现出与水石榴石非常相似的红外光谱。对这种类石榴石矿物的结构分析可以提供关于水生石榴石中H取代的性质的更多信息。这些研究的结果将对控制天然水石榴石“稳定性”的晶体化学因素提供洞察力，这种矿物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.