High-Pressure Crystal Chemistry of Earth Materials
High-Pressure Crystal Chemistry of Earth Materials
批准号:
9805282
负责人:
Charles Prewitt
金额:
$7.6万
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
1998
资助国家:
美国
项目状态:
已结题
起止时间:
1998-09-01 至 2000-08-31
中文摘要
9805282 Prewitt/哈岑/芬格地球内部的动态历史和现状源于地球物质的性质;对地球过程的详细了解从根本上取决于这些物质在高压和高温下的结构表征。地球物理实验室是开发在极端条件下对单晶和粉末样品进行现场衍射研究的技术的先驱。美国国家科学基金会最近的设备赠款支持购买一个新的衍射仪与CCD探测器将使我们能够测量非常小的晶体的全三维衍射图案,确定影响晶体性能的缺陷范围的性质,并在一系列增加/减少压力和/或温度迅速收集数据。 具体的实验将集中在硅酸盐,氧化物和硫化物的结构研究,致密含水镁硅酸盐的氢键模型,多阳离子氧化物中的阳离子排序,以及可以提供有关地球过程和材料信息的各种模拟化合物。我们还将继续为希望进行晶体学实验的外部研究人员提供设施和支持,特别是在高压和高温下。
英文摘要
9805282Prewitt/Hazen/FingerThe dynamic history and present state of the Earth's interior result from properties of earth materials; detailed understanding of earth processes depend fundamentally on structural characterization of these materials at high pressures and temperatures. The Geophysical Laboratory has been a pioneer in developing techniques for in-situ diffraction studies on both single crystal and powder samples under extreme conditions. A recent NSF equipment grant supporting the purchase of a new diffractometer with a CCD detector will enable us to measure full three-dimensional diffraction patterns of very small crystals, determine the nature of a range of defects affecting crystal properties, and to collect data rapidly at a series of increasing/decreasing pressures and/or temperatures. Specific experiments will focus on structure investigations of silicates, oxides, and sulfides, hydrogen bonding models for dense hydrous magnesium silicates, cation ordering in multi-cation oxides, and various analog compounds that can provide information about earth processes and materials. We will also continue to provide facilities and support to outside investigators who want to conduct crystallographic experiments, especially at high pressures and temperatures.
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K-Fe Sulfides and Fe-Ni Phosphides at Core Pressures and Temperatures
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批准号:0073433
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项目类别:Continuing Grant
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资助金额:$12.31万
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财政年份:2000
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负责人:Charles Prewitt
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依托单位:
High-Pressure Crystal Chemistry of Earth Materials
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批准号:9973018
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项目类别:Continuing Grant
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资助金额:$27.0万
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财政年份:1999
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负责人:Charles Prewitt
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依托单位:
Phase Transitions in Rock-Forming Minerals at Crustal Pressures and Temperatures
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批准号:9117433
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项目类别:Standard Grant
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资助金额:$3.5万
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财政年份:1992
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负责人:Charles Prewitt
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依托单位:
Microscopic and Macroscopic Study of Mineral Phase Transitions
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批准号:8618602
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项目类别:Continuing Grant
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资助金额:$15.0万
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财政年份:1987
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负责人:Charles Prewitt
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依托单位:
Three-Dimensional Analysis and Computer Modelling of Schooling Patterns of Pelagic Animals
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批准号:8618558
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项目类别:Continuing Grant
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资助金额:$19.82万
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财政年份:1987
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负责人:Charles Prewitt
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依托单位:
Acquisition of a Single-Crystal Diffractometer with a Rotating-Anode X-ray Generator
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批准号:8618649
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项目类别:Standard Grant
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资助金额:$12.5万
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财政年份:1987
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负责人:Charles Prewitt
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依托单位:
Systematic Relations Among Crystallographic, Chemical, and Elastic Properties of Minerals
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批准号:8319504
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项目类别:Continuing Grant
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资助金额:$39.85万
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财政年份:1984
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负责人:Charles Prewitt
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依托单位:
Systematic Relations Among Crystallographic, Chemical and Elastic Properties
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批准号:8120950
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项目类别:Continuing Grant
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资助金额:$18.12万
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财政年份:1982
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负责人:Charles Prewitt
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依托单位:
X-Ray Diffractometer For Experiments at High Temperatures And Pressures
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批准号:7924031
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项目类别:Standard Grant
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资助金额:$7.8万
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财政年份:1980
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负责人:Charles Prewitt
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依托单位:
A Symposium on Crystallographic Studies Using Energy- Dispersive Diffraction, Boston, Ma, August 12-17, 1979
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批准号:7913197
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项目类别:Standard Grant
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资助金额:$0.25万
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财政年份:1979
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负责人:Charles Prewitt
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依托单位:
Industry/University Cooperative Research Activity: Synthesis, Crystal Structures, and Catalytic Activity of Ternary Noble-Metal Oxides
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批准号:7906900
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项目类别:Standard Grant
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资助金额:$24.68万
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财政年份:1979
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负责人:Charles Prewitt
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依托单位:
Systematic Relationships Among Crystallographic, Chemical, And Elastic Properties of Minerals
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批准号:7713042
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项目类别:Standard Grant
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资助金额:$27.37万
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财政年份:1977
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负责人:Charles Prewitt
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依托单位:
Conference on Mineral Physics, Warrenton, Virginia, October 17-19, 1977
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批准号:7713494
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项目类别:Standard Grant
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资助金额:$0.8万
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财政年份:1977
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负责人:Charles Prewitt
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依托单位:
Improvement of Electron Microprobe/X-Ray Diffractometer Control System
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批准号:7300538
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项目类别:Standard Grant
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资助金额:$0.96万
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财政年份:1975
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负责人:Charles Prewitt
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依托单位:
国内基金
海外基金
Research on the Rapid Growth Mechanism of KDP Crystal
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批准号:10774081
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项目类别:面上项目
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资助金额:45.0万元
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批准年份:2007
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负责人:滕冰
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依托单位: