A synchrotron X-ray spectroscopy study of titanium co-ordination in explosive melt glass derived from the trinity nuclear test.
A synchrotron X-ray spectroscopy study of titanium co-ordination in explosive melt glass derived from the trinity nuclear test.
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本文用X射线吸收光谱法研究了1945年7月16日Trinity爆炸熔融玻璃中钛的形态。Ti K边XANES表明，所有样品的Ti均以Ti（iv）氧化态存在。通过高斯函数拟合前边缘特征并与已知Ti配位的标准进行比较，发现样品之间的Ti配位环境存在显着变化。Ti配位的变化可能归因于几个因素，包括特定的局部化学和样品的热历史，保持高度不均匀的显微结构的三长岩和长石砂岩源材料。本文首次利用X射线吸收光谱法测定了钛的形态和配位。
The speciation of Ti in trinitite, the explosive melt glass derived from the Trinity Test of 16th of July 1945, was investigated by X-ray absorption spectroscopy (XAS). Ti K-edge XANES showed that Ti was present in the Ti(iv) oxidation state for all samples. Fitting of pre-edge features by Gaussian functions and comparison with standards of known Ti coordination revealed significant variation in Ti coordination environment between samples. The variation of Ti coordination may be attributed to several factors including specific local chemistry and thermal histories of samples, in keeping with the highly heterogeneous microstructure of trinitite and the arkosic sand source material. This work presents the first determination of Ti speciation and co-ordination in trinitite via the use of X-ray absorption spectroscopy.
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