【摘 要】
：
研究表明,在地球大气层中90％的氙气(Xe)不知去向,这就是行星学中著名的"Missing Xe Paradox",即"氙气消失之谜".人们普遍认为Xe存储在地球内部,但存在的位置和形态是地学领域
【机 构】
：
吉林大学超硬材料国家重点实验室DepartmentofPhysicsandAstronomy,UniversityCollegeLondon
【出 处】
：
第七届国际分子模拟与信息技术应用学术会议
论文部分内容阅读
研究表明,在地球大气层中90％的氙气(Xe)不知去向,这就是行星学中著名的"Missing Xe Paradox",即"氙气消失之谜".人们普遍认为Xe存储在地球内部,但存在的位置和形态是地学领域长期争议的课题.1997年《科学》期刊发表了理论和实验合作论文,认为Xe和铁(地核的主要构成元素)无法反应形成稳定的化合物,排除了Xe存储在地核内部的可能性.论文利用CALYPSO结构预测方法,首次从理论上提出Xe可以与铁和镍在地核的压力和温度条件下发生化学反应,形成一系列稳定的化合物(例如,XeFe3,XeFe5,XeNi3,XeNi5等等).论文研究结果推翻了前期Xe和铁无法反应的论断,认为地核可以是氙气的藏身之所,很可能为"氙气消失之谜"提供了答案.
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