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Vibrational spectroscopic investigation of the goethite thermal decomposition products (1992)

Kustova, G. N. ; Burgina, E. B. ; Sadykov, V. A. ; [et al.]

Springer

Physics and chemistry of minerals 18 (1992), S. 379-382

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ISSN: 1432-2021

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology , Geosciences , Physics

Notes: Abstract Goethite, hematite and intermediate products of goetite thermal decomposition were studied by IR and Raman spectroscopy to identify these products used as catalysts of some chemical reactions. The presence of a small number of OH-groups in the products of the decomposition up to 900–1000° C was supposed to hinder the formation of perfect hematite structure. The hypothesis concerning C 3v 6 space group of protohematite indistinguishable from D 3d 6 space group of hematite by X-Ray diffraction was suggested. This hypothesis explains both the additional lines in IR and Raman spectra compared to hematite spectra and the same position of peaks in X-Ray diffraction picture.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00199419

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