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Print version ISSN 1516-1439On-line version ISSN 1980-5373
ARAUJO, José Humberto de; SILVA, Nagib Francisco da; ACCHAR, Wilson and GOMES, Uílame Umbelino. Thermal decomposition of illite. Mat. Res. [online]. 2004, vol.7, n.2, pp.359-361. ISSN 1516-1439. http://dx.doi.org/10.1590/S1516-14392004000200024.
The effect of heat treatment on illite in air at temperatures ranging from 750 to 1150 °C was studied using the Mössbauer effect in 57Fe. The dependence of the Mössbauer parameters and relative percentage of the radiation absorption area was measured as a function of the firing temperature. The onset of thermal structural decomposition occurred at 800 °C. With rising temperature, the formation of hematite (Fe2O3) increased at the expense of the silicate mineral.
Keywords : Illite; Thermal decomposition; Mössbauer Spectroscopy.