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「Experimental and theoretical co-operative research on macro and micro structures and physical properties of minerals」

“矿物宏观、微观结构和物理性质的实验与理论合作研究”

基本信息

批准号：
04302023
负责人：
MATSUMOTO Takeo
金额：
$ 3.26万
依托单位：
Kanazawa University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04302023/
关键词：
Minerals Macro^- and Micro^- structures Solid materials Crystallographic groups Crystallographic Orbits Simulation Phase transition High pressure forms Crystals X線回折

项目摘要

The present cooperative research was initiated to research theoretyically and expirimentally on macro and micro structures and physical properties of minerals by 20 investigators in Japan. Each investigator researchs his own task Two meetings for this project were held in Tokyo (1992) and Kanazawa (1993).The main results are shown according to research groups.1)Macro and Micro structures using optical and electron microscopies. Microstructure and the relation of water and dislocation for silica minerals are summarized. The similarity for the spectroscopy of achondrites and that of S-type asteroid has been found.2)Micro analyzes of minerals using X-ray, EXAFS, XANES, SIMS etc. mehods. A new system for structure analysis of the micrometer-sized materials using SR, and a new approach for determination of Laue group were developed. Structures of superconductors, Co-akermanite, Bi203, NaCuPO4, plagioclase etc. are determined.3)Phase equilibrium, structures and physical properties under high pressure and high temperature. Growth form of diamond, phases E,F and superhydrous B for Mg-silicates, epitaxia growth of hydroxyapatite in mantle garnet were discussed. Pressure-induced amorphization and enthalpy of transition for GeO2 were studied. Phase transformation of tridymite was studied.4)Theoretical studies based on symmetry. Simulation for structural change of MgSiO3 was caluculated. Research for statistical distribution of crystals for symmetry groups is now in progress. Crystallographic orbits and their characteristic properties are summarized.

这次合作研究是由日本20名研究人员发起的，旨在对矿物的宏观和微观结构及物理性质进行理论和实验研究。每个研究人员都研究自己的任务，为这个项目在东京(1992年)和金泽(1993年)举行了两次会议。主要结果是根据研究小组显示的。1)使用光学和电子显微镜的宏观和微观结构。综述了硅酸盐矿物的微观结构和水与位错的关系。用X射线、EXAFS、XANES、SIMS等方法对矿物进行微观分析。发展了一种微米级材料结构分析的新系统和一种测定劳埃基团的新方法。确定了超导体、钴锰矿、Bi203、NaCuPO4、斜长石等的结构。3)高压高温下的相平衡、结构和物理性能。讨论了金刚石的生长形式、镁硅酸盐的E相、F相和高水B相，以及地幔石榴石中羟基磷灰石的外延生长。研究了GeO2的压力诱导非晶化和相变热。4)基于对称性的理论研究。对硅酸镁的结构变化进行了模拟计算。对称群晶体统计分布的研究目前正在进行中。综述了晶体轨道及其特征性质。