Spinelli, A.Oliveira, A. P. N.Soledade, Luiz Edmundo BastosPaskocimas, Carlos AlbertoSilva, Elson Longo daSouza, A. G.Chicariano, C. A.Flores, J. A.2021-04-202021-04-202005SPINELLI, A.; OLIVEIRA, A. P. N.; SOLEDADE, L. E. B.; PASKOCIMAS, C. A.; LONGO, E.; SOUZA, A. G.; CHICARIANO, C. A.; FLORES, J. A.. Propiedades ópticas del pigmento α-Fe2O3/SiO2. Boletín de La Sociedad Española de Cerámica y Vidrio, [S.L.], v. 44, n. 4, p. 223-227, 30 ago. 2005. Disponível em: http://boletines.secv.es/areas/resultados_busqueda.php. Acesso em: 20 mar. 2021. http://dx.doi.org/10.3989/cyv.2005.v44.i4.434.0366-3175https://repositorio.ufrn.br/handle/123456789/32295Presently work describes the synthesis of the pigment α-hematites/SiO2 according to the method of mixture of oxides. The red color of the pigment corresponds to the transitions electronic 6A1g→ 4T1g y 6A1g→ 4T2g of the ion Fe+3 that presents the configuration structural d5 and it is connected to six oxygen in the structure of the hematites. The changes in the shade of the red color of the pigment are related with the in the entropy do system and consequent decrease of the “ bandgap “. The compound α-hematites/SiO2 it was shown as a promissory ceramic pigment for application to the temperature of 1100°CAttribution 3.0 Brazilhttp://creativecommons.org/licenses/by/3.0/br/Pigmento rojoAplicación cerámicaTransición electrónica de Fe+3EntropíaGAParticle10.3989/cyv.2005.v44.i4.434