Bailey D J, Stennett M C, Ravel B, Crean D E, Hyatt N C
Immobilisation Science Laboratory, Department of Materials Science and Engineering, University of Sheffield UK
National Institute of Standards and Technology 100 Bureau Drive Gaithersburg MD 20899 USA.
RSC Adv. 2019 Apr 26;9(23):12921-12927. doi: 10.1039/c8ra10375e. eCollection 2019 Apr 25.
The speciation of Ti in trinitite, the explosive melt glass derived from the Trinity Test of 16 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.
通过X射线吸收光谱（XAS）研究了1945年7月16日三位一体核试验产生的爆炸熔融玻璃——熔结凝灰岩中钛的形态。钛K边X射线吸收近边结构（XANES）表明，所有样品中的钛均以Ti(IV)氧化态存在。用高斯函数对前缘特征进行拟合，并与已知钛配位标准进行比较，结果显示样品之间钛的配位环境存在显著差异。钛配位的变化可能归因于几个因素，包括样品的特定局部化学性质和热历史，这与熔结凝灰岩和长石砂岩源材料高度不均匀的微观结构一致。
