Analysis of bulk and inorganic degradation products of stones, mortars and wall paintings by portable Raman microprobe spectroscopy

Pérez-Alonso, M.; Castro, Kepa; Martínez‐Arkarazo, Irantzu; Angulo, Manuel Pombo; Olazabal, María Ángeles; Madariaga, Juan Manuel

doi:10.1007/s00216-004-2496-2

Cited by 85 publications

(61 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As far as the yellow hues present at the vase and the woman's belt (points 15.A and 16.A) and the angel's vest (point 7.A), the Raman spectra collected by using both excitation sources exhibit the typical peak of goethite (a-FeO(OH); Raman band at about 403 cm -1 [10]). Finally, it needs to be noticed that the presence of Pb sulfates (anglesite, PbSO 4 ) might point out the ongoing red lead alteration process due to atmospheric SO 2 [11]. In fact, as evidenced by recent researches [12][13][14], such secondary phase is occasionally detected on discolored red lead [15], even if this soluble lead salt may be often leached during aging in humid conditions.…”

Section: Reddish Huesmentioning

confidence: 96%

Nondestructive Raman investigation on wall paintings at Sala Vaccarini in Catania (Sicily)

et al. 2016

View full text Add to dashboard Cite

In this work, the results of a Raman campaign for studying seventeenth-century Sicilian frescoes, by using two portable Raman systems, equipped with different excitation sources (785 and 1064 nm), are proposed. The measurements were performed with the aim to provide an in situ diagnostic analysis of the wall paintings (in terms of colorants and preparation layer) and to support the conservators in the framework of the ongoing restoration. The combined use of the two Raman spectrometers has given a complete overview on the artist palette and on the state of preservation of frescoes, also informing us about the technique employed by the painter. Natural pigments as hematite, vermillion, goethite, lead red, lead white and carbon-based black pigments have been identified. Additionally, the application of a transitional RomanesqueRenaissance frescoes method has been noticed by the systematic combined presence of calcite and gypsum in the substrate. Finally, the analyses have highlighted the presence of degradation products, mainly related to alteration of lead-based pigments.

show abstract

Section: Reddish Huesmentioning

confidence: 96%

Nondestructive Raman investigation on wall paintings at Sala Vaccarini in Catania (Sicily)

et al. 2016

View full text Add to dashboard Cite

show abstract

“…In many of these studies, the availability of compact portable Raman instruments is extremely valuable for in situ studies where several areas can be monitored and mapped in expanded time-and length-scales [11,195,235].…”

Section: Deterioration Products and Conservation Treatmentsmentioning

confidence: 99%

Raman Spectroscopy of cultural heritage Materials: Overview of Applications and New Frontiers in Instrumentation, Sampling Modalities, and Data Processing

Casadio

Daher

Bellot-Gurlet

2016

Topics in Current Chemistry Collections

View full text Add to dashboard Cite

show abstract

“…FTIR is also a reliable method for the characterization of the organic matter preserved in carbonates, and generally in all types of sedimentary rocks (Ravisankar et al, 2010;Schiavon, 2007). Raman spectroscopy and micro-Raman study provides a tool for examination of building stones, and is particularly useful for the investigation of surface degradation (Perez-Alonso et al, 2004;PotgieterVermaak et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Fourier transform infrared spectroscopic characterization of clay minerals from rocks of Lalibela churches, Ethiopia

Kiros¹,

Gholap²,

Gigante³

2013

Int. J. Phys. Sci.

View full text Add to dashboard Cite

This study demonstrates the Fourier transform infrared (FTIR), Raman spectroscopy and scanning electron microscope -energy dispersive X-ray spectrometer (SEM-EDS) techniques which has been applied to characterize decay products and processes occurring at the surface of rock-hewn churches at the UNESCO's World Heritage site of Lalibela, Northern Ethiopia. Spectroscopic analyses comparing the observed frequencies with the available literature, minerals were identified. A special emphasis is devoted to the presence of whewellite/weddellite and kaolinite minerals, never pointed out before this study in the rock hewn churches of Lalibela, and their possible roles on rock decay. The identification of montmorillonite as a weathering product up to 20 mm from the rock/atmosphere interface beyond the level at which kaolinite, whewellite and gypsum are found, suggests that montmorillonite may penetrate even deeper into the rock substrate causing major rock decay. Results indicate that biological attack by green algae and lichens is currently responsible for severe stone surface, physical and chemical weathering leading to considerable weakening of the churches walls. A prompt and careful removal of the biological and other deposits with the non-destructive method (laser cleaning) treatment is therefore recommended.

show abstract

Analysis of bulk and inorganic degradation products of stones, mortars and wall paintings by portable Raman microprobe spectroscopy

Cited by 85 publications

References 39 publications

Nondestructive Raman investigation on wall paintings at Sala Vaccarini in Catania (Sicily)

Nondestructive Raman investigation on wall paintings at Sala Vaccarini in Catania (Sicily)

Raman Spectroscopy of cultural heritage Materials: Overview of Applications and New Frontiers in Instrumentation, Sampling Modalities, and Data Processing

Fourier transform infrared spectroscopic characterization of clay minerals from rocks of Lalibela churches, Ethiopia

Contact Info

Product

Resources

About