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首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >Bonding of xenon to oxygen in magmas at depth
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Bonding of xenon to oxygen in magmas at depth

机译：氙气在岩浆中粘接到磁性的氧气

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AbstractThe field of noble gases chemistry has witnessed amazing advances in the last decade with over 100 compounds reported including Xe oxides and Xe–Fe alloys stable at the pressure-temperature conditions of planetary interiors. The chemistry of Xe with planetary materials is nonetheless still mostly ignored, while Xe isotopes are used to trace a variety of key planetary processes from atmosphere formation to underground nuclear tests. It is indeed difficult to incorporate the possibility of Xe reactivity at depth in isotopic geochemical models without a precise knowledge of its chemical environment. The structure of Xe doped hydrous silica-rich melts is investigated byin situhigh energy synchrotron X-ray diffraction using resistive heating diamond anvil cells. Obtained pair distribution functions reveal the oxidation of Xe between 0.2 GPa and 4 GPa at highTup to 1000 K. In addition to the usual interatomic distances, a contribution at 2.05±0.05 ? is observed. This contribution is not observed in the undoped melt, and is interpreted as the Xe–O bond, with a coordination number of about 12 consistent with Xe insertion in rings of the melt structure. Xe solubility measurements by electron microprobe and particle induced X-rays emission analysis confirm that Xe and Ar have similar solubility values in wt% in silicate melts. These values are nonetheless an order of magnitude higher than those theoretically calculated for Xe. The formation of Xe–O bonds explains the enhanced solubility of Xe in deep continental crust magmas, revealing a mechanism that could store Xe and fractionate its isotopes. Xenon is indeed atypical among noble gases, the
机译：<！[CDATA [ 抽象 稀有气体化学见证在过去十年中惊人的进步有超过100个化合物的字段中报告包括Xe的氧化物和Xe - 铁合金在稳定行星内部的压力 - 温度条件下。氙与行星物质的化学反应仍然仍然主要被忽略，而氙的同位素用于跟踪各种从大气中形成地下核试验的关键行星过程。这实在是难以将在同位素地球化学模型深度氙反应的可能性没有它的化学环境的精确认识。氙的结构掺杂含水富含二氧化硅的熔化是通过考察原位使用电阻加热金刚石砧细胞高能同步加速器X射线衍射。获得对分布函数揭示的Xe 0.2 GPA和为4GPa之间在高温氧化Ť高达1000 K.在除了通常的原子间距离，在2.05±0.05的贡献？观察到。这种贡献不是在未掺杂的熔观察到的，并且被解释为氙-O键，具有约12的Xe插入在熔体结构的环一致的配位数。氙溶解度测量通过电子探针和粒子诱发X射线发射分析确认的Xe和Ar的硅酸盐熔体以重量％相似溶解度值。这些值仍然比那些氙理论上计算幅值高一个数量级。的氙-O键的形成解释Xe中在深大陆地壳岩浆的增强的溶解性，揭示了可以存储的Xe和分馏及其同位素的机构。氙气是惰性气体中的确是非典型的

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