Far Infra-Red Absorption Spectra of Ferric Oxides and Oxyhydroxides

DOI Web Site Web Site
  • Suëtaka Wataru
    Research Institute for Iron, Steel and Other Metals, Tôhoku Universtiy

Bibliographic Information

Other Title
  • 鉄の酸化物，オキシ酸化物の遠赤外吸收スペクトル
  • 鉄の酸化物,オキシ酸化物の遠赤外吸収スペクトル
  • テツ ノ サンカブツ , オキシ サンカブツ ノ エンセキガイ キュウシュウ スペクトル

Search this article

Abstract

Far infra-red spectroscopy is believed to be a very powerful tool for identifying metallic compounds and studying their structures. Ferric oxides and oxyhydroxides are important corrosion products of iron alloys, but their far infra-red spectra have never been reported. For this reason, the far infra-red spectra of α-, β- and γ-FeOOH and α- and γ-Fe2O3 were observed in the region of 25∼220 μ. In addition, the diffuse reflection spectra of these compounds were measured, since diffuse reflection spectroscopy may also be a convenient method for identification of the compounds.<BR>The measurement of the far infra-red spectra of powdered samples was carried out using a JASCO DS-501G grating far infra-red spectrophotometer. Fine powders of the compounds were dispersed in MgO, and the diffuse reflection spectra of the dispersed samples were observed over the region of 240∼1100 mμ.<BR>It has been observed that the compounds show the characteristic absorption bands in the far infra-red region. The measurement of far infra-red spectra has proved to be an excellent method for identifying these compounds. An absorption band at 286 cm−1 of α-FeOOH and those at 266 cm−1 of β- and γ-FeOOH are assigned tentatively to be the absorption due to the out of plane deformation vibration of the -O-H group. The results also show characteristic absorption curves for each compound in the diffuse reflection spectra, indicating the applicability of diffuse reflection spectroscopy for the said purpose.

Journal

Keywords

Details 詳細情報について

Report a problem

Back to top