MISC

1997年10月

IR active orientation of OH bending mode in topaz

PHYSICS AND CHEMISTRY OF MINERALS
  • K Shinoda
  • ,
  • N Aikawa

24
8
開始ページ
551
終了ページ
554
記述言語
英語
掲載種別
DOI
10.1007/s002690050071
出版者・発行元
SPRINGER VERLAG

Infrared(IR) and nearinfrared (NIR) absorption spectra of hydrous and F-rich topazes were measured to assign an OH bending mode of topaz. Three absorption peaks at 1165, 3650, and 4803 cm(-1) are assigned to OH related absorption peaks. Since a peak at 4803 cm(-1) can be assigned to a combination mode of 1165 and 3650 cm(-1), the 1165 cm(-1) peak is harmonic with the 3650 cm(-1) peak. Polarized IR absorption spectra of (100), (010), and (001) planes of the hydrous topaz were measured to examine IR active orientation of the 1165 cm(-1) OH related mode. Three pleochroic distributions of the absorption peak at 1165 cm(-1) on (100), (010), and (001) planes indicate an active orientation of the 1165 cm(-1) OH related mode. The IR active orientation of the 1165 cm(-1) OH related mode in topaz is normal to the OH dipole. The orthogonality and harmonic combination mode indicate that the 1165 cm(-1) peak is OH bending mode, The active orientation of OH bending mode is polarized in the plane normal to the OH dipole. The polarization suggests that anisotropic thermal vibration of protons on the hydroxyl is maximum along the IR active orientation.

Web of Science ® 被引用回数 : 11

リンク情報
DOI
https://doi.org/10.1007/s002690050071
CiNii Articles
http://ci.nii.ac.jp/naid/80009941031
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:A1997YF43000002&DestApp=WOS_CPL

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