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Figueiredo, MO, TP Silva, and JP Veiga. "Analysis of degradation phenomena in ancient, traditional and improved building materials of historical monuments." Applied Physics a-Materials Science & Processing. 92 (2008): 151-154. Abstract
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Figueiredo, Ondina M., Teresa Pereira Silva, João Pedro Veiga, and Isabel M. Dias. "Speciation state of cobalt in blue glazes: a XAFS study on XVI cent. chinese blue-&-white porcelains." EMRS 2009 Spring Meeting, Symposium R-X-Ray Techniques for Advanced Materials, Nanostructures and Thin Films from Laboratory Sources to Synchronotron Radiation, June 8-12, 2009. 2009. Abstract
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Figueiredo, Ondina M., Teresa Pereira Silva, Maria João Batista, Daniel PS Oliveira, and João Pedro Veiga. "Scarce industrial commodities: a glance at the possible rhenium availability in mining residues from the exploitation of Portuguese ore deposits." Materials 2013: International Conference. 2013. Abstract
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Figueiredo, MO, TP Silva, and JP Veiga. "A XANES study of cobalt speciation state in blue-and-white glazes from 16th to 17th century Chinese porcelains." Journal of Electron Spectroscopy and Related Phenomena. 185 (2012): 97-102. Abstract
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Figueiredo, Ondina M., Teresa Pereira Silva, and João Pedro Veiga. "Inferring the formal oxidation state of 3d metal ions from K-edge XANES spectra: how far can we go for cobalt in ancient chinese porcelain glazes?" 2nd International Workshop Physical and Chemical Analytical echniques in Cultural Heritage. 2012. Abstract
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Figueiredo, E., A. Lackinger, B. C. Rey, R. J. C. Silva, JP Veiga, and J. Mirão. "An Experimental Approach for Smelting Tin Ores From Northwestern Iberia." Materials and Manufacturing Processes. 32 (2017): 765-774.
Figueiredo, MO, T. Pereira da Silva, JP Veiga, C. Leal Gomes, and V. De Andrade. "The blue colouring of beryls from Licungo, Mozambique: an X-ray absorption spectroscopy study at the iron K-edge." Mineralogical Magazine. 72 (2008): 175-178. Abstract
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Figueiredo, MO, TP Silva, JP Veiga, AMD Diogo, and L. Trindade. "Archaeology of Lisbon Old City: ceramic crucibles from pre-XVIIIth century metallurgical foundries." Applied Physics a-Materials Science & Processing. 79 (2004): 327-329. Abstract
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Figueiredo, MO, JP Veiga, TP Silva, P. B. Lourenço, and P. Roca. "Materials and reconstruction techniques at the aqueduct of Carthage since the Roman period." Historical constructions. Guimarães: Universidade do Minho (2001): 391-400. Abstract
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Figueiredo, Elin, Beatriz Comendador Rey, João Fonte, Emmanuelle Meunier, Aaron Lackinger, Rui JC Silva, João Pedro Veiga, Carlo Bottaini, José Mirão, and Alexandre Lima. "Estanho antigo no Noroeste Peninsular: uma abordagem multidisciplinar e transfronteiriça para o estabelecimento de uma visão integrada." XI Congresso Ibérico de Arqueometria. 2015. Abstract
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Figueiredo, MO, JP Veiga, and J. P. Mirao. "Modelling the size of red-colouring copper nanoclusters in archaeological glass beads." Applied Physics a-Materials Science & Processing. 83 (2006): 499-502. Abstract
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Figueiredo, MO, TP Silva, JP Veiga, J. Mirão, and S. Pascarelli. "Speciation of antimony in ancient tile glazes: a XAFS study." 14 th ESRF Users Meetg (2004): 8-13. Abstract
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Figueiredo, MO, JP Veiga, and T. Pereira da Silva. "Ageing of high-lead glazes in XVI - XVII century tiles." Proceedings of the International Conference on Non-Destructive Testing and Micro-Analysis for the Diagnostics and Conservation of the Cultural and Environmental Heritage. 2002. 8. Abstract
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Figueiredo, MO, TP Silva, and JP Veiga. "The blue of iron in mineral pigments: a Fe K-edge XANES study of vivianite." Applied Physics a-Materials Science & Processing. 99 (2010): 357-361. Abstract
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Figueiredo, Ondina M., Teresa Pereira Silva, and João Pedro Veiga. "An X-ray spectrometry and absorption spectroscopy study of blue-and-white glazes from ancient Chinese porcelains." European Conference on X-ray Spectrometry-EXRS2010. 2010. Abstract
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Figueiredo, Ondina M., Teresa Pereira Silva, João Pedro Veiga, Daniel PS Oliveira, and Maria João Batista. "X-ray absorption spectroscopy at Re L3-edge applied to mine waste materials: a possible input to the sustainable recovery of rhenium." 2nd Meeting of Synchrotron Radiation Users from Portugal and ESRF-Day. 2013. Abstract
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Figueiredo, Ondina M., Teresa Pereira Silva, João Pedro Veiga, Maria Isabel Prudêncio, Maria Isabel Dias, MA Matos, and AM Pais. "Blue pigments in XVI-XVII century glazes: a comparative study between Portuguese faiences and Chinese porcelains." Selected Papers Archaeological and Arts Issues in Materials Science, Univ. Nac. Autónoma de México, 2010 (2010). Abstract
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Figueiredo, Ondina M., Teresa Pereira Silva, and João Pedro Veiga. "Nanophases in the mineral world: the unique case of ferrihydrite." III Annual Meeting I3N. 2011. Abstract
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Figueiredo, E., J. Fonte, A. Lima, JP Veiga, R. J. C. Silva, and J. Mirão. "Ancient tin production: Slags from the Iron Age Carvalhelhos hillfort (NW Iberian Peninsula)." Journal of Archaeological Science. 93 (2018): 1-16.
Figueiredo, Ondina M., Teresa Pereira Silva, and João Pedro Veiga. "Oxidation state and coordination of iron in red pre-soils: first results from a Fe K-edge XANES study on regoliths from Santiago Island, Cape Verde." European Geoscience Union, General Assembly 2008, Division of Soil System Science SSS-14 New Frontiers in Soil Analysis (2008). Abstract
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Figueiredo, MO, JP Veiga, TP Silva, J. P. Mirao, and S. Pascarelli. "Chemistry versus phase constitution of yellow ancient tile glazes: A non-destructive insight through XAS." Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions With Materials and Atoms. 238 (2005): 134-137. Abstract
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Figueiredo, MO, TP Silva, and JP Veiga. "Analysis of degradation phenomena in ancient, traditional and improved building materials of historical monuments." Applied Physics A. 92 (2008): 151-154. Abstract
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Figueiredo, Elin, Alexandra Rodrigues, João Fonte, Emmanuelle Meunier, Filipa Dias, Alexandre Lima, José Alberto Gonçalves, Luís Gonçalves-Seco, Filipe Gonçalves, Manuel F. C. Pereira, Rui JC Silva, and João P. Veiga. "Tin and Bronze Production at the Outeiro de Baltar Hillfort (NW Iberia)." Minerals. 12 (2022). AbstractWebsite

Findings of Iron Age metallurgical activities related to tin metal and mining are very rare. In the present work, we present a detailed study of the Outeiro de Baltar hillfort, dated to the Late Iron Age/Early Roman period, located in a place where 20th century tin mining work took place. Elemental and microstructural analysis by portable, micro and wavelength dispersive X-ray fluorescence spectrometry (pXRF, micro-XRF and WDXRF) and scanning electron microscopy with energy dispersion spectrometer (SEM-EDS) showed that metallurgical debris found at the archaeological site is related to tin smelting and binary and ternary bronze productions. Analysis of the artefacts of diverse typologies found at the site showed that a variety of metals and alloys were in circulation and use. Samples of tin ores (cassiterite) from the region were analyzed for comparison with an archaeological tin slag from the site. The analytical results point to the production of tin metal using local cassiterite and the production of bronze by directly adding cassiterite into a smelting process. Furthermore, data of remote sensing (airborne Light Detection and Ranging (LiDAR) and historical aerial imagery) and Geographical Information System (GIS) mapping were combined with archival mining documentation and maps to retrieve a landscape context for the site. The study showed that the place of the Outeiro de Baltar hillfort (NW Iberia) was mined periodically over time.

Figueiredo, MO, TP da Silva, JP Veiga, and P. Chevallier. "Phosphatization of basaltic rocks from Sal Island, Cape Verde Archipelago: A microtopochemical approach using synchrotron radiation X-ray fluorescence." Journal De Physique Iv. 104 (2003): 399-402. Abstract
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Figueiredo, Ondina M., Teresa Pereira Silva, and João Pedro Veiga. "Ancient Chinese blue-and-white porcelain glazes: can we measure the oxidation state of cobalt through X-ray absorption spectroscopy?" 1º Encontro Nacional dos Utilizadores da Radiação de Sincrotrão= 1st Meeting of Synchrotron Radiation Users from Portugal. 2012. Abstract
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