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6575698 
Journal Article 
Micro-XRF analysis of a Brazilian polychrome sculpture 
Freitas, RP; Anjos, MJ; Felix, VS; Pereira, MO; Santos, RS; Oliveira, A; Goncalves, EAS; Ferreira, DS; Pimenta, AR; Pereira, LO; , 
2019 
1 
Microchemical Journal
ISSN: 0026-265X
EISSN: 1095-9149 
ELSEVIER 
AMSTERDAM 
149 
6 
English 
WOS:000480374600058 
In this work, microsamples extracted from a Saint John the Evangelist polychrome sculpture, dating from the beginning of the eighteenth century and found in Rio de Janeiro, Brazil, were analyzed with micro-XRF and complimentary X-ray Fluorescence (XRF) techniques, Raman Spectroscopy, and Optic Microscopy (OM). As a result of the study, the pigments azurite [2CuCO(3)'Cu(OH)(2)], massicot (PbO), vermilion [HgS], calcite [CaCO3] and gypsum [CaSO(4 center dot)2H(2)O] were characterized. Through the images obtained by the microelemental mapping, it was verified that some tonalities were produced by pigment mixing, i.e., the green polychrome on the sculpture resulted from a mix of azurite and massicot. In addition to the characterization of the materials used in the sculpture, numerical iterations were implemented using Python programming language to perform correlations between the elemental maps, the values of which were validated by the results of the study. 
Micro-XRF; Historical pigments; Micro-XRF data analysis; synchrotron-radiation; raman-spectroscopy; pigments; fragments; paintings; version; Chemistry 
IRIS
• Inorganic Mercury Salts (2)
     Mercuric Sulfide
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