Spectroscopic investigation of early medieval tiles and bedding mortars from Nonantola (Modena, Italy) excavations

Bergamo, M.; Ferri, Lavinia de; Cianciosi, Alessandra; Gelichi, Sauro; Pojana, Giulio

doi:10.1140/epjp/i2019-12642-x

Cited by 2 publications

(2 citation statements)

References 40 publications

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“…Such intense electronic Raman lines have been already observed in vitreous natural materials as well as on ceramics when excited with wavelengths ≥785 nm. [67][68][69] Reported explanations related them to the presence of electronic transitions associated to transition metals hosted by these materials [70] as well as to rare earths able to give rise to such intense structures even when in in very low concentrations (a few ppm). [67,68] On the basis of these previous interpretations, we attempted the attribution of these signals to clay minerals, even if a clear distinction of Raman features typical of such compounds could not be obtained.…”

Section: Natural Earthsmentioning

confidence: 99%

Spectroscopic characterization of commercial pigments for pictorial retouching

Corradini

Ferri

Pojana

2020

J Raman Spectroscopy

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A set of 27 commercially available pigments by Kremer Pigmente (Aichstetten, Germany), including traditional and synthetic compounds, has been characterized in detail from a chemical and mineralogical point of view in the frame of a wide research project about pigments and colorants involving different spectroscopic techniques such as reflectance spectroscopy (in both visible and near‐infrared intervals), Fourier‐transform infrared spectroscopy (in both attenuated total reflection and reflection modes), and Raman spectroscopy. These pigments are currently employed for pictorial retouch purposes of both ancient and contemporary works of art, and a deep comprehension of their composition is fundamental in order to better understand their long‐term behavior after application.This work presents Raman results found analyzing the set of pigments in order to identify existing phases and comparing them with datasheets available by Kremer Pigmente: some inconsistencies were found, especially concerning correspondences with Chemical Abstracts Service (CAS) numbers, pigment codes, and color indexes, together with the absence of some compounds in the records.Most Raman signals were attributed to specific vibrational modes, even if in some cases, only related chemical species were identified, whereas information regarding individual vibrational modes was not found in the literature. The whole volume of data generated in this project will represent a useful tool for the study of artworks permitting both the interpretation of spectral information obtainable mostly from portable instruments and for the evaluation of materials to be used for pictorial retouching.

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Section: Natural Earthsmentioning

confidence: 99%

Spectroscopic characterization of commercial pigments for pictorial retouching

Corradini

Ferri

Pojana

2020

J Raman Spectroscopy

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“…These methods resulted in the acquisition of relevant information about both the ceramic bodies and the glazes. With regard to the ceramic bodies, Raman spectroscopy was employed to examine the composition, technology and raw materials of potteries [9][10][11][12][13][14] or to check alteration phases. [15] Concerning the specific context of this study, investigations on Medieval findings were carried out by Catalano et al, on Southern Italy (Apulian) protomajolica fragments whose blue surface colour was due to the use of lapis lazuli as pigment, [16] identified also on Iranian potteries dated back to the 13th century.…”

Section: Introductionmentioning

confidence: 99%

Raman and SEM‐EDS insights into technological aspects of Medieval and Renaissance ceramics from Southern Italy

Caggiani

Barone

Ferri

et al. 2020

J Raman Spectroscopy

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An analytical investigation performed on Southern Italy pottery highlighted the usefulness of Raman spectroscopy to give answers to archaeological questions. It can provide important information concerning the production technology and raw materials constituting the glassy coatings. Raman spectroscopy was supported by Scanning Electron Microscopy coupled with Energy Dispersive X‐ray Spectroscopy (SEM‐EDS) for observations and elemental analysis. The studied samples, ranging from the 13th century lead‐tin‐glazed protomajolica to the 15th –16th enamelled pottery, come from the Castles of Montella and Ariano Irpino (Campania), from the castles of Scicli and Modica and from surveys carried out in Buscemi and Caltagirone (Sicily). Glassy matrices, opacifying agents, colour‐related raw materials and body‐coating interface crystalline phases were investigated. Though the coatings resulted all typically lead‐rich glass types, lumps showing a different Raman profile suggested that at least in one case, the batch was adultered with recycled glass waste. Furthermore, samples coming from Montella, belonging to the three main classes of ceramics defined by archaeological hypothesis, could be grouped according to their cassiterite content. The crystallization of lead–potassium feldspars at the coating‐body interface in a group of samples was ascertained. With regard to the origin of colours, the spectra of blue coatings highlighted phases that can be traced back to the use of Co‐based and Co–As‐based raw materials, while turquoise decorations were found to contain malayaite.

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Spectroscopic investigation of early medieval tiles and bedding mortars from Nonantola (Modena, Italy) excavations

Cited by 2 publications

References 40 publications

Spectroscopic characterization of commercial pigments for pictorial retouching

Spectroscopic characterization of commercial pigments for pictorial retouching

Raman and SEM‐EDS insights into technological aspects of Medieval and Renaissance ceramics from Southern Italy

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