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橄榄石的等温状态方程 被引量:1

ISOTHERMAL EQUATION OF STATE OF OLIVINE
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摘要 利用金刚石对顶砧(DAC)高压装置产生高压,使用16∶3∶1的甲醇、乙醇和水混合液体作为传压介质,在室温下,40 GPa的压力范围内,对橄榄石(olivine)进行了原位高压同步辐射能量色散X射线衍射(EDXRD)研究。实验结果表明,在所研究压力范围内,采自张家口大麻坪天然新鲜橄榄石的结构稳定,未见相变和压致非晶现象发生。用Birch-Murnaghan方程对测得的V-p数据进行了数值拟合,当K′T0=4时,橄榄石的零压体弹模量为KT0=141.3±3.2 GPa。 The in-situ synchrotron radiation diffraction of olivine under high pressure has been studied in the range of 0-40 GPa with diamond anvil cell (DAC), using methanol-ethanol-water (16:3: 1) mixture as the transmission medium. We have not found any convincing evidence for a phase transformation or pressure-induced amorphization in the experimental pressure range. We fit the Birch-Mumaghun equation of state and obtained its ambient pressure hulk modulus and its first order derivative of olivine: KTo = (141.3 ± 3.2) GPa.
出处 《矿物学报》 CAS CSCD 北大核心 2006年第4期373-376,共4页 Acta Mineralogica Sinica
基金 国家自然科学基金资助项目(No.1029904050334030) 国家重点基础研究发展计划项目资助(No.2001CB711201)
关键词 橄榄石 同步辐射 高压 X射线衍射 DAC olivine synchrotron radiation high pressure X-ray diffraction DAC
作者简介 国家自然科学基金资助项目(No.10299040;50334030);国家重点基础研究发展计划项目资助(No.2001CB711201)
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