Characterization of different samples of the gypsum mineral from the Araripe gypsum Pole: from macro to micro with Rietveld refinement

Edjan de Castro Souza; Raquel Aline Pessoa Oliveira; Andrea de Vasconcelos Ferraz

doi:10.15628/holos.2023.14902

Autores/as

Edjan de Castro Souza Federal University of Vale do São Francisco https://orcid.org/0000-0002-1152-442X
Raquel Aline Pessoa Oliveira Universidade Federal do Vale do São Francisco https://orcid.org/0000-0002-8455-1226
Andrea de Vasconcelos Ferraz Universidade Federal do Vale do São Francisco https://orcid.org/0000-0001-8043-1414

DOI:

https://doi.org/10.15628/holos.2023.14902

Palabras clave:

Gypsum Mineral, x-ray difraction, x-ray fluorescence, Rietveld Method, Araripe Gypsum Pole

Resumen

The gypsum mineral is composed of calcium sulfate dihydrate and has as its main application the production of gypsum plaster. In the deposits of the Araripe gypsum pole there are, in natura, different varieties, identified by the names: "Johnson", alabaster, "estrelinha", "cocadinha", "rapadura" and "boró". The characterization of the varieties of gypsum in fracture was performed by SEM and the characterization of the powder was performed by FRX and DRX. By FRX, the presence of CaO was detected with a weight range of 42.5% to 47.1%, and SO₃ with a weight range of 48.1% to 53.2%. By XRD analysis, the majority gypsum phase was identified, with the presence of the crystalline planes characteristic of the mineral. From the refinement by the Rietveld method a X² result between 0.86 and 1.11 was obtained, and it was possible to obtain information about the microstructure of the gypsum varieties and their unit cell.

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Biografía del autor/a

Edjan de Castro Souza, Federal University of Vale do São Francisco

Graduated in Chemistry from Instituto Federal de Educação, Ciência e Tecnologia do Sertão Pernambucano (IF Sertão PE); Technician in Information Technology and Communication with Emphasis on Software Development from the Education Secretary of the State of Pernambuco (SEEPE); Master in Materials Science from UNIVASF; PhD in progress in Materials Science. Has experience in the areas: Teaching; Materials Science with emphasis on materials characterization; Information Technology.

Raquel Aline Pessoa Oliveira, Universidade Federal do Vale do São Francisco

Raquel Aline Pessoa é professora adjunta do Colegiado de Engenharia Elétrica da Universidade Federal do Vale do São Francisco (Univasf), Doutora em Física da Matéria Condensada (2012), mestre em Física (2009) e licenciada em Física (2007) pela Universidade Federal de Sergipe. Especialista em Docência do Ensino Superior pela Faculdade de Sergipe (FASE). Atualmente é docente permanente do Programa de pós-graduação em Ciência dos Materiais da Univasf. Coordenadora do Projeto intitulado "Laboratório Multiusuário de Caracterização e Desenvolvimento de Materiais" - LaMDeM (Chamada Pública MCTI/FINEP/FNDCT 02/2016). Coordena as atividades do Grupo de Pesquisa Síntese, Caracterização e Luminescência de Materiais (SCL-Mat) na UNIVASF. Atua principalmente nos seguintes temas: desenvolvimento e caracterização de materiais cerâmicos, detectores de radiação e metrologia das radiações ionizantes.

Andrea de Vasconcelos Ferraz, Universidade Federal do Vale do São Francisco

Possui mestrado em Química e Biotecnologia pela Universidade Federal de Alagoas e doutorado em Ciência dos Materiais pela Universidade Federal de Pernambuco (2007). Atualmente é professor adjunto da Universidade Federal do Vale do São Francisco. Tem experiência na área de Química, com ênfase em Polímeros e Colóides, atuando principalmente nos seguintes temas: cardanol, porcelanato, reciclagem de resíduos industriais, poliacrilatos e polyacrylic esther resins. Apresenta experiência na área de Ciências de Materiiais, com ênfase em materiais cerâmicos, compósitos e novos materiais.

Citas

Antunes, V. et al. (2014). Characterization of gypsum and anhydrite ground layers in 15th and 16th centuries Portuguese paintings by Raman Spectroscopy and other techniques. Journal of Raman Spectroscopy, v. 45, n. 11-12, p. 1026-1033. DOI: https://doi.org/10.1002/jrs.4488

Bouzit, S. et al. (2019). Characterization of natural gypsum materials and their composites for building applications. Applied Sciences, v. 9, n. 12, p. 2443. DOI: https://doi.org/10.3390/app9122443

Comodi, P. et al. (2008). High-pressure behavior of gypsum: A single-crystal X-ray study. American Mineralogist, v. 93, n. 10, p. 1530-1537. DOI: https://doi.org/10.2138/am.2008.2917

Eremin, A. et al. (2016). Determination of Calcium Sulfate Hemihydrate Modification by X-ray Diffraction Analysis. Procedia engineering, v. 165, p. 1343-1347, 2016. DOI: https://doi.org/10.1016/j.proeng.2016.11.862

Fukami, T. et al. (2015). Synthesis, Crystal Structure, and Thermal Properties of CaSO4.2H2O Single Crystals. International Journal of Chemistry, v. 7, n. 2, p. 12, 2015. DOI: https://doi.org/10.5539/ijc.v7n2p12

Gonçalves, N. S. et al, M. (2012). Size-strain study of NiO nanoparticles by X-ray powder diffraction line broadening. Matterials Letters, p. 36-38, v. 72. DOI: https://doi.org/10.1016/j.matlet.2011.12.046

Henry, P. F., Weller, M. T., & Wilson, C. C. (2009). Neutron powder diffraction in materials with incoherent scattering: an illustration of Rietveld refinement quality from nondeuterated gypsum. Journal of Applied Crystallography, v. 42, n. 6, p. 1176-1188. DOI: https://doi.org/10.1107/S0021889809043210

Klein, C., & Dutrow, B. (2012). Manual de ciências dos minerais. 23ed., Bookman. 716p.

Lins, C. A. C. (2018). Informe Geoquímico da Bacia do Araripe: estados de Pernambuco, Piauí e Ceará. CPRM.

Oliveira, F. M. et al. (2012). Características mineralógicas e cristalográficas da gipsita do Araripe. HOLOS, 5, p. 71–82. DOI: https://doi.org/10.15628/holos.2012.1140

Rietveld, H. M. (1969) A profile refinement method for nuclear and magnetic scructures. Acta Crystallographica. n. 2, p. 65-71. DOI: https://doi.org/10.1107/S0021889869006558

Schmid, T., Jungnickel, R., & Dariz, P. (2020). Insights into the CaSO4–H2O system: A Raman-spectroscopic study. Minerals, v. 10, n. 2, p. 115. DOI: https://doi.org/10.3390/min10020115

Sharpe R. & Cork G. (2006). Gypsum and anhydrite. In: Kogel JE, Kogel JE et al (eds) Industrial minerals & rocks. Society for Mining, Metallurgy, and Exploration, Inc, Littletown, p 519–540.

Silva, R.; Giulietti, M. (2010). Fosfogesso: geração, destino e desafios. Em: OLIVEIRA, J.; FERNANDEZ, F.; CASTILHOS, S. (eds). Agrominerais para o Brasil. Rio de Janeiro: CETEM; MCT, p 125-144.

Ungár, T. (2008). Dislocation Model of Strain Anisotropy. Powder Diffraction, v. 23, p. 125-132. DOI: https://doi.org/10.1154/1.2918549

Williamson, G. K., & Hall, W. H. (1953). X-ray line broadening from filed aluminium and wolfram. Acta metallurgica, v. 1, n. 1, p. 22-31. DOI: https://doi.org/10.1016/0001-6160(53)90006-6

Young, R. A. (1993). The rietveld method. International union of crystallography. Ed. Oxford University Press. v. 5, p. 1-38. DOI: https://doi.org/10.1093/oso/9780198555773.001.0001