In-Situ Infrared Spectra of OH in Pakistan Forsterite at High Temperature
The hydroxyl of the gem-grade forsterite from Pakistan was measured by the polarized spectra at room temperature to 1000 °C, showing four unambiguous absorption bands at 3612, 3597, 3579, and 3566 cm<sup>−1</sup>. Here, we report angle-resolved polarized IR spectroscopy of the crystal-or...
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2021
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oai:doaj.org-article:f1e8ac0b1fff4d3aa18098b29a107e162021-11-25T17:17:36ZIn-Situ Infrared Spectra of OH in Pakistan Forsterite at High Temperature10.3390/cryst111112772073-4352https://doaj.org/article/f1e8ac0b1fff4d3aa18098b29a107e162021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4352/11/11/1277https://doaj.org/toc/2073-4352The hydroxyl of the gem-grade forsterite from Pakistan was measured by the polarized spectra at room temperature to 1000 °C, showing four unambiguous absorption bands at 3612, 3597, 3579, and 3566 cm<sup>−1</sup>. Here, we report angle-resolved polarized IR spectroscopy of the crystal-oriented forsterite, which were heated at 1 bar up to 1000 °C in situ to investigate the hydrogen diffusion character. The peak positions of the IR absorbance at 3579 cm<sup>−1</sup>, 3597 cm<sup>−1</sup>, and 3566 cm<sup>−1</sup> of forsterite decreased linearly depending on the temperature, while the 3612 cm<sup>−1</sup> is stable. We discuss that the dipole orientation of the hydroxyl is analyzed by a pleochroic scheme of the integrated absorbance vs. sample to polarizer angle. Our data suggest that the temperature effect cannot be ignored since the absorption coefficients and absorbance band positions of OH may alter.Xiao-Guang LiWen SuYu-Yu ZhengXiao-Yan YuMDPI AGarticleforsteritehydroxylpolarized IRcrystal orientationdehydrogenationCrystallographyQD901-999ENCrystals, Vol 11, Iss 1277, p 1277 (2021) |
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DOAJ |
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DOAJ |
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forsterite hydroxyl polarized IR crystal orientation dehydrogenation Crystallography QD901-999 |
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forsterite hydroxyl polarized IR crystal orientation dehydrogenation Crystallography QD901-999 Xiao-Guang Li Wen Su Yu-Yu Zheng Xiao-Yan Yu In-Situ Infrared Spectra of OH in Pakistan Forsterite at High Temperature |
| description |
The hydroxyl of the gem-grade forsterite from Pakistan was measured by the polarized spectra at room temperature to 1000 °C, showing four unambiguous absorption bands at 3612, 3597, 3579, and 3566 cm<sup>−1</sup>. Here, we report angle-resolved polarized IR spectroscopy of the crystal-oriented forsterite, which were heated at 1 bar up to 1000 °C in situ to investigate the hydrogen diffusion character. The peak positions of the IR absorbance at 3579 cm<sup>−1</sup>, 3597 cm<sup>−1</sup>, and 3566 cm<sup>−1</sup> of forsterite decreased linearly depending on the temperature, while the 3612 cm<sup>−1</sup> is stable. We discuss that the dipole orientation of the hydroxyl is analyzed by a pleochroic scheme of the integrated absorbance vs. sample to polarizer angle. Our data suggest that the temperature effect cannot be ignored since the absorption coefficients and absorbance band positions of OH may alter. |
| format |
article |
| author |
Xiao-Guang Li Wen Su Yu-Yu Zheng Xiao-Yan Yu |
| author_facet |
Xiao-Guang Li Wen Su Yu-Yu Zheng Xiao-Yan Yu |
| author_sort |
Xiao-Guang Li |
| title |
In-Situ Infrared Spectra of OH in Pakistan Forsterite at High Temperature |
| title_short |
In-Situ Infrared Spectra of OH in Pakistan Forsterite at High Temperature |
| title_full |
In-Situ Infrared Spectra of OH in Pakistan Forsterite at High Temperature |
| title_fullStr |
In-Situ Infrared Spectra of OH in Pakistan Forsterite at High Temperature |
| title_full_unstemmed |
In-Situ Infrared Spectra of OH in Pakistan Forsterite at High Temperature |
| title_sort |
in-situ infrared spectra of oh in pakistan forsterite at high temperature |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/f1e8ac0b1fff4d3aa18098b29a107e16 |
| work_keys_str_mv |
AT xiaoguangli insituinfraredspectraofohinpakistanforsteriteathightemperature AT wensu insituinfraredspectraofohinpakistanforsteriteathightemperature AT yuyuzheng insituinfraredspectraofohinpakistanforsteriteathightemperature AT xiaoyanyu insituinfraredspectraofohinpakistanforsteriteathightemperature |
| _version_ |
1718412567552983040 |