Análise de pinturas rupestres do Abrigo do Janelão (Minas Gerais) por microscopia raman

Faria, Dalva Lúcia Araújo de; Lopes, Francisco Nascimento; Souza, Luiz Antônio Cruz; Branco, Helena David de Oliveira Castello

doi:10.1590/s0100-40422011000800012

Cited by 12 publications

(11 citation statements)

References 26 publications

(38 reference statements)

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“…Furthermore, the peaks at 242 cm -1 , 347 cm -1 , 540 cm -1 and 681 cm -1 were assigned to optical phonon modes of SnO 2 , E u (1) TO, E u (2) LO, A 2u TO and A 2u LO of SnO 2 , where LO and TO are longitudinal and transverse optical phonons, respectively 34,[38][39][40] . Peaks at 1354 and 1587 cm -1 are termed D and G bands, respectively 41 , and confirm the presence of amorphous carbon that is typical of the temperature and of the sol-gel route used for obtain the nanocomposite.…”

Section: Ftir and Raman Analysesmentioning

confidence: 86%

Rice Husk Reuse in the Preparation of SnO2/SiO2Nanocomposite

et al. 2015

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Section: Ftir and Raman Analysesmentioning

confidence: 86%

Rice Husk Reuse in the Preparation of SnO2/SiO2Nanocomposite

et al. 2015

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“…In situ nondestructive analysis on prehistoric drawings with portable instruments was made on rock paintings in the Rouffignac‐Saint‐Cernin and Villars caves (Dordogne, France) (Lahlil et al; Beck et al,), confirming the use of mixtures of manganese oxides (romanechite and pyrolusite). De Faria et al experimented Raman spectroscopy on rock‐art paintings from Abrigo do Janelão (Minas Gerais, Brazil), and identified white pigment as calcite (CaCO 3 ), charcoal as black, goethite (α‐FeOOH) as yellow and hematite (α‐Fe 2 O 3 ) as red ochres. Whewellite (CaC 2 O 4 .H 2 O) and weddelite (CaC 2 O 4 .2H 2 O) were detected, which are common degradation products of microbiological activity.…”

Section: Introductionmentioning

confidence: 99%

Raman spectroscopy of minerals and mineral pigments in archaeometry

Bersani

Lottici

2016

J Raman Spectroscopy

136

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Minerals, as raw structural materials or pigments, play a fundamental role in archaeometry, for the understanding of nature, structure and status of an artefact or object of interest for cultural heritage. A detailed knowledge of the mineral phases is crucial to solve archaeological problems: Raman spectroscopy is a powerful investigation technique and has been applied extensively in the last 30 years on mineral identification and on pigment degradation. Here we report an updated review, covering the last decade, of the applications of Raman techniques to issues in which raw minerals, including mineral pigments, are involved. Particular attention is devoted to cases where the Raman analysis of minerals is deeper than a simple identification of the phases present in an archaeological or artistic object. Copyright © 2016 John Wiley & Sons, Ltd.

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“…Several research papers have been published on the Raman spectroscopic analysis of rock art. [70][71][72][73][74][75][76] However, most of them were carried out in the laboratory on micro-samples. Ravindran et al 76 combined on-site investigations with the analysis of microsamples, when studying rock-shelter paintings in Bhimbetka (India).…”

Section: Applicationsmentioning

confidence: 99%

The role of mobile instrumentation in novel applications of Raman spectroscopy: archaeometry, geosciences, and forensics

2014

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The applications of analytical Raman spectroscopy in the characterisation of materials associated with archaeologically excavated artefacts, forensic investigations of drugs of abuse, security and crime scenes, minerals and rocks and future astrobiological space missions are now well established; however, these applications have emphasised the need for new developments in the area of miniaturised instrumentation which extends the concept and breadth of the analytical requirement to facilitate the provision of data from 'in field' studies. In this respect, the apparently unrelated themes of art and archaeology, forensic science, geological science and astrobiology as covered by this review are unified broadly by the ability to record data nondestructively and without resorting to sampling and the subsequent transfer of samples to the analytical laboratory. In studies of works of art there has long been a requirement for on-site analysis, especially for valuable paintings held under strict museum security and for wall paintings which cannot physically be removed from their setting; similarly, the use of portable Raman spectroscopy in archaeological and geological field work as a first-pass screening device which obviates the necessity of multiple and wasteful specimen collection is high on the wish-list of practicing spectroscopists. As a first-pass screening probe for forensic crime scenes, Raman spectroscopy has proved to be of inestimable value for the early detection of dangerous and prohibited materials such as drugs of abuse, explosives and their chemical precursors, and banned contraband biomaterials such as ivories and animal products; in these applications the advantage of the Raman spectroscopic technique for the recognition of spectral signatures from mixtures of inorganic and organic compounds is paramount and not afforded by other less portable instrumental techniques. Finally, in astrobiological work, these requirements also apply but with the additional prerequisite for system operation remotely - often over distances of several hundred million kilometres - as part of instrumental suites on robotic spacecraft and planetary landers; this necessitates robust and reliable instrumentation for the observation of unique and characteristic spectral features from the planetary geological surface and subsurface which are dependent on the assignment of both biological and geological band signatures.

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Análise de pinturas rupestres do Abrigo do Janelão (Minas Gerais) por microscopia raman

Cited by 12 publications

References 26 publications

Rice Husk Reuse in the Preparation of SnO2/SiO2Nanocomposite

Rice Husk Reuse in the Preparation of SnO2/SiO2Nanocomposite

Raman spectroscopy of minerals and mineral pigments in archaeometry

The role of mobile instrumentation in novel applications of Raman spectroscopy: archaeometry, geosciences, and forensics

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