Araújo, José Humberto deSilva, Nagib Francisco daGomes, Uílame UmbelinoAcchar, Wilson2020-05-152020-05-152004ARAUJO, Jose Humberto de et al. Thermal decomposition of illite. Materials Research, São Carlos, v. 7, n. 2, p. 359-361, 2004. ISSN 1516-1439 versão online. Disponível em: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392004000200024&lng=en&tlng=en. Acesso em: 15 maio 2020. https://doi.org/10.1590/S1516-14392004000200024.ISSN 1516-1439 (print) 1980-5373 (online)https://repositorio.ufrn.br/jspui/handle/123456789/28983The 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.Attribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/IlliteThermal decompositionMössbauer Spectroscopyarticle10.1590/S1516-14392004000200024