A new way of transformation from a-quartz to coesite  

作　　者：SU Wenhui LIU Shue XU Dapeng WANG Weiran YAO Bin GUO Xingyuan LIU Zhiguo ZHONG Zheng 

机构地区：[1]Center for the Condensed Matter Science and Technology, Harbin Institute of Technology, Harbin 150001, China [2]Center for Rare-Earth Solid State Physics, Jilin University, Changchun 130023, China [3]International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110015, China [4]Center for Condensed Matter and Radiation Physics, China Center of Advanced Science and Technology （World Laboratory）, Beijing 100080, China [5]Department of Physics, University of Windsor, Windsor, ON N9B 3P4, Canada

出　　处：《Progress in Natural Science:Materials International》2006年第10期1090-1097,共8页自然科学进展·国际材料（英文版）

基　　金：Supported by National Natural Science Foundation of China (Grant No. 10374022)

摘　　要：A laboratory method combining the high-energy mechanical ball milling and high static pressure has been suggested for modelling synthesis of coesite in the Earth＇s crust. A window of milling time, a mechanical collision-induced intermediate phase of a-quartz and its condition of easily crystallizing into coesite under the condition of 3.0 GPa, 923 K, 〈 1.0 rain have been discovered. The new method needs much shorter synthesizing time and lower synthesizing critical pressure than those used before. The Raman spectra for the coesite synthesized by the present method have covered all the information of those natural and synthesized coesites reported before. It is demonstrated that this method has a great potential in geo-science research and implied the other possible mechanism of coesite formation in the Earth＇s crust.联合高精力的机械球 milling 和高静态的压力的一个实验室方法为在地球的外壳中为 caesite 的合成建模被建议了。milling 时间，石英的一个机械导致碰撞的中间的阶段和它容易在 3.0 GPa 的条件下面结晶进 coesite 的条件的一扇窗户， 923 K， < 1.0 min 被发现了。新方法比以前使用的那些需要许多更短的综合时间和更低的综合批评压力。为 coesite 的拉曼系列由现在的方法综合了论及以前报导的那些自然、综合的 coesites 的所有信息。这个方法在地球科学研究有一个大潜力，这被表明并且在地球的外壳中暗示了 coesite 形成的另外的可能的机制。

关 键 词：quartz-coesite high-energy mechanical ball milling high state pressure Raman spectrum metastable phase subduction-exhumation of plate. 

分 类 号：TB44[一般工业技术]