七种含铁氧化物和硅酸盐，包括$<trans\; data-src="(">(</trans>{\text{<trans data-src="Mg">镁</trans>}}_{\mathrm{<trans\; data-src="0.88">0.88</trans>}}<trans\; data-src=",">,</trans>{\text{<trans data-src="Fe">铁</trans>}}_{\mathrm{<trans\; data-src="0.12">0.12</trans>}}<trans\; data-src=")">)</trans>\text{<trans data-src="SiO">二氧化硅</trans>}$,$<trans\; data-src="(">(</trans>{\text{<trans data-src="Mg">镁</trans>}}_{\mathrm{<trans\; data-src="0.86">0.86</trans>}}<trans\; data-src=",">,</trans>{\text{<trans data-src="Fe">铁</trans>}}_{\mathrm{<trans\; data-src="0.14">0.14</trans>}}<trans\; data-src=")">)</trans><trans\; data-src="(">(</trans>{\text{<trans data-src="Si">硅</trans>}}_{\mathrm{<trans\; data-src="0.98">0.98</trans>}}<trans\; data-src=",">,</trans>{\text{<trans data-src="Al">铝</trans>}}_{\mathrm{<trans\; data-src="0.02">0.02</trans>}}<trans\; data-src=")">)</trans>{\text{<trans data-src="O">O（运行）</trans>}}_{\mathrm{<trans\; data-src="3">三</trans>}}$钙钛矿，和$<trans\; data-src="(">(</trans>{\text{<trans data-src="Mg">镁</trans>}}_{\mathrm{<trans\; data-src="0.80">0.80</trans>}}<trans\; data-src=",">,</trans>{\text{<trans data-src="Fe">铁</trans>}}_{\mathrm{<trans\; data-src="0.20">0.20</trans>}}<trans\; data-src=")">)</trans>$使用$\text{<trans data-src="Fe">铁</trans>}\text{<trans data-src="\hspace{0.17em}">\hspace{0.17em}</trans>}\mathrm{<trans\; data-src="K">K（K）</trans>}$-环境温度下高达85 GPa压力下的边缘x射线吸收近边缘光谱。第一原理计算$\text{<trans data-src="Fe">铁</trans>}\text{<trans data-src="\hspace{0.17em}">\hspace{0.17em}</trans>}\mathrm{<trans\; data-src="K">K（K）</trans>}$-的边缘$<trans\; data-src="(">(</trans>{\text{<trans data-src="Mg">镁</trans>}}_{\mathrm{<trans\; data-src="0.88">0.88</trans>}}<trans\; data-src=",">,</trans>{\text{<trans data-src="Fe">铁</trans>}}_{\mathrm{<trans\; data-src="0.12">0.12</trans>}}<trans\; data-src=")">)</trans>\text{<trans data-src="SiO">二氧化硅</trans>}$钙钛矿和$<trans\; data-src="(">(</trans>{\text{<trans data-src="Mg">镁</trans>}}_{\mathrm{<trans\; data-src="0.80">0.80</trans>}}<trans\; data-src=",">,</trans>{\text{<trans data-src="Fe">铁</trans>}}_{\mathrm{<trans\; data-src="0.20">0.20</trans>}}<trans\; data-src=")">)</trans>\text{<trans data-src="O">O（运行）</trans>}$铁方镁石是用自旋相关法进行的。收集的数据的数量和质量允许对这些地球物理重要系统中作为压力函数的吸收边缘特征进行系统研究，为带结构计算提供直接的实验验证。通过实验和理论的比较，可以详细分析Fe价态和自旋态修饰对光谱的影响，从而定性证实（Mg，Fe$<trans\; data-src="(">(</trans>\text{<trans data-src="Mg">镁</trans>}<trans\; data-src=",">,</trans>\text{<trans data-src="Fe">铁</trans>}<trans\; data-src=")">)</trans><trans\; data-src="(">(</trans>\text{<trans data-src="Si">硅</trans>}<trans\; data-src=",">,</trans>\text{<trans data-src="Al">铝</trans>}<trans\; data-src=")">)</trans>{\text{<trans data-src="O">O（运行）</trans>}}_{\mathrm{<trans\; data-src="3">三</trans>}}$钙钛矿。

• 收到日期：2009年1月14日

内政部：https://doi.org/10.103/PhysRevB.79.174115