High-Pressure Behavior of Framework Minerals

骨架矿物的高压行为

• 批准号: 0408460
• 负责人: Nancy Ross
• 金额: $ 29.48万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-07-01 至 2008-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0408460&HistoricalAwards=false
• 关键词: Pressure; Behavior; Framework; Minerals

Framework structures are ubiquitous and include the feldspars and perovskites, major components of the Earth's crust and mantle, respectively. Perovskites also have one of the most technologically important structure-types used for electronic materials, including superconductors, gmr, ferroelastics and ferroelectric device materials. This project will use single-crystal X-ray diffraction to determine high-precision structure measurements of framework solid solutions in situ at high pressure in order to elucidate the elastic and thermodynamic effects of various element and defect substitutions into end-members. These detailed studies will lay the basis for developing predictive models for the high-pressure behavior of feldspars and perovskites, as well as other complex framework minerals, including garnets and titanites. The results obtained with this grant will therefore provide fundamental insights and constraints on the geochemistry and mineralogy of the Earth's interior, as well as having widespread application in materials sciences. The award of this grant will also support the training of scientists at all levels, including the hosting of a crystallography workshop each year for students and faculty from regional undergraduate institutions.

框架结构无处不在，包括长石和钙钛矿，它们分别是地壳和地幔的主要成分。 钙钛矿也是用于电子材料的技术上最重要的结构类型之一，包括超导体、巨磁电阻、铁弹性体和铁电器件材料。该项目将利用单晶X射线衍射来确定高压下原位骨架固溶体的高精度结构测量，以阐明各种元素和缺陷替代到端元中的弹性和热力学效应。这些详细研究将为开发长石和钙钛矿以及其他复杂骨架矿物（包括石榴石和钛矿）的高压行为预测模型奠定基础。因此，通过这笔赠款获得的结果将为地球内部的地球化学和矿物学提供基本见解和限制，并在材料科学中得到广泛应用。这笔赠款还将支持各级科学家的培训，包括每年为地区本科院校的学生和教师举办晶体学研讨会。