Characterization of OH-containing phases by TEM using electron energy-loss spectroscopy (EELS) : clinohumite-OH, chondrodite-OH, phase A and the (F, OH)-solid solution series of topaz
Characterization of OH-containing phases by TEM using electron energy-loss spectroscopy (EELS) : clinohumite-OH, chondrodite-OH, phase A and the (F, OH)-solid solution series of topaz
复制标题
使用电子能量损失光谱 (EELS) 通过 TEM 表征含 OH 相：斜腐石-OH、球粒陨石-OH、A 相和黄玉的 (F, OH)-固溶体系列
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
B. Wunder
中科院分区：
文献类型：
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作者：
R. Wirth;B. Wunder
通过 TEM 晶格条纹技术和电子能量损失光谱 (EELS) 对三种致密水合硅酸镁 (DHMS)、斜硅酸镁、球粒镁石-OH、A 相以及 (F,OH)-固溶体系列黄玉的合成和天然样品进行了研究。 EEL 光谱在 500-750 eV 的能量范围内获得，包括约 528 eV 处的 OH 相关峰、约 532 eV 处的 O-K 边缘和约 685 eV 处的 F-K 边缘。 EELS 测定的 OH/O 强度比与实验条件下的暴露时间无关。测量的 OH/O 强度比取决于样品的厚度。针对这种厚度依赖性进行校正后，通过 EELS 测量的三个 DHMS 相的 OH/O 强度比可以与其 OH 含量相关。此外，EELS 已被证明可用作半定量方法，通过测量厚度校正的 OH/O 强度比来确定黄玉中的 X OH 含量。
Three Dense Hydrous Magnesium Silicates (DHMS), clinohumite-OH, chondrodite-OH, phase A, and synthetic and natural samples of the (F,OH)-solid solution series of topaz were investigated by TEM lattice fringe technique and electron energy-loss spectroscopy (EELS). EEL spectra were acquired within the energy-range 500-750 eV including an OH-related peak at about 528 eV, the O-K edge at about 532 eV, and the F-K edge at about 685 eV. The OH/O-intensity ratios determined by EELS are independent of the exposure time under the experimental conditions. The OH/O-intensity ratios measured depend on the thickness of the specimen. Corrected for this thickness dependence, the OH/O-intensity ratios measured by EELS for the three DHMS-phases can be correlated with their OH-contents. Additionally, it has been shown that EELS can be used as a semiquantitative method to determine the X OH -content in topaz by measuring thickness-corrected OH/O-intensity ratios.