Infrared absorption spectra of some Manganese Dioxide Modifications and their thermal products | Zendy

Kolta G. A. | Zendy; Kerim F. M. Abdel | Zendy; Azim A. A. Abdul | Zendy

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Infrared absorption spectra of some Manganese Dioxide Modifications and their thermal products

Author(s) -

Kolta G. A.,

Kerim F. M. Abdel,

Azim A. A. Abdul

Publication year - 1971

Publication title -

zeitschrift für anorganische und allgemeine chemie

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.354

H-Index - 66

eISSN - 1521-3749

pISSN - 0044-2313

DOI - 10.1002/zaac.19713840311

Subject(s) - manganese , infrared spectroscopy , infrared , amorphous solid , absorption (acoustics) , absorption spectroscopy , spectral line , analytical chemistry (journal) , materials science , chemistry , optics , crystallography , environmental chemistry , organic chemistry , metallurgy , physics , astronomy , composite material

The infrared absorption spectra of α‐, β‐, γ‐ and δ‐ MnO 2 prepared by different methods, were measured and discussed. It was found that the ratio of absorbancies of the bands at 595 ± 20 cm −1 und 535 ± 20 cm −1 (φ) is related to the amorphous content. Each preparation is characterized by a certain value of φ. The mode of change of φ as a result of heating the different preparations is discussed. Infrared spectra help in differentiating α‐, γ and δ‐MnO 2 on the one hand, and β‐MnO 2 on the other, and in indicating the transformation of γ‐into β‐MnO 2 by heating the former at 450 °C.

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