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 63v space group of protohematite indistinguishable from D 63d 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.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Arkhipenko DK (1981) About possibility of the selection of space groups with the same rules of systematic absence by the vibrational spectroscopy methods. In: Arkhipenko (ed) Molecular spectroscopy and X-ray analysis of minerals. Nauka, Novosibirsk, pp 8–40
Beattie IR, Gibson TR (1970) The single crystal Raman spectra of nearly opaque materials. Iron (III) oxide and chromium (III) oxide. J Chem Soc A 6:980–986
Goss CJ (1987) The kinetics and reaction mechanism of the goethite to hematite transformation. Mineral Mag 51:437–451
Krivoruchko OP, Buyanov RA, Abaulina LI, Ostankovich AA, Dulepov EV, Kolomiychuk VN (1974) Investigation of the real structure of acicular goetite, formed at ageing stage of the catalysts production. Kinet Catal 15:1323–1326
Lazarev AN, Mirgorodoskiy AP, Ignatiev IS (1975) Vibrational spectra of complex oxides. Nauka, Leningrad
Onari S, Arai T, Kudo K (1977) Infrared lattice vibration and dielectric dispersion in α-Fe2O3. Phys Rev B 16:1717–1721
Rendon JL, Cornejo J, Arambarri P, Serna CJ (1983) Pore structure of thermally treated goethite (α-FeOOH). J Colloid Interface Sci 92:508–516
Rooksby HP (1961) In: X-ray identification and structures of clay minerals. Mineral Soc pp 361–376
Ruppin R, Englman R (1970) Optical phonons of small crystals. Rep Prog Phys 33:149–196
Serna CJ, Iglesias JE (1986) Nature of protohaematite and hydrohaematite. J Mater Sci 5:901–902
Wolska E (1981) The structure of hydrohematite. Z Kristallogr 154:69–75
Wolska E, Szajda W (1985) Structural and spectroscopic characteristics of synthetic hydrohaematite. J Mater Sci 20:4407–4412
Wolska E, Schwertmann U (1989a) Selective X-Ray line Broadening in the Goethite — Derived hematite phase. Phys Status Solidi 114:K11-K16
Wolska E, Schwertman U (1989b) Nonstoichiometric structures during dehydroxylation of goethite. Z Kristallogr 154:69–75
Yariv Sh, Mendelovici E (1979) The effect of degree of crystallinity on the infrared spectrum of hematite. Appl Spectros 33:410–411
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kustova, G.N., Burgina, E.B., Sadykov, V.A. et al. Vibrational spectroscopic investigation of the goethite thermal decomposition products. Phys Chem Minerals 18, 379–382 (1992). https://doi.org/10.1007/BF00199419
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00199419