Phase transitions in Pb8O5(XO4)2 (X = As and V) compounds

Oliveira, Erneson A.; Silva, E. N.; Paschoal, Alexandre Rocha; Dantas, S.M.C.; Guedes, I.; Mendes-Filho, J.; Polla, G.; Ayala, A. P.

doi:10.1002/jrs.2886

Cited by 2 publications

(2 citation statements)

References 29 publications

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“…Phases already observed in corroded bronzes were also reported (sulfates, chlorides and mixtures) . The references correspond to previous Raman studies where such phases have been already observed in bronze patina and/or to reference works on these phases . Table lists the phases identified for each item.…”

Section: Resultsmentioning

confidence: 79%

On‐site Raman and XRF analysis of Japanese/Chinese bronze/brass patina – the search for specific Raman signatures

Colomban

Tournié

Maucuer³

et al. 2011

J Raman Spectroscopy

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The assignment of Asian bronzes and brasses is difficult because the copies of ancient pieces have been made a long time ago in different countries. A selection of 30 Japanese and/or Chinese bronzes/brasses are studied on‐site in the storage and exhibition rooms of the Cernuschi Museum, in Paris, using portable Raman and X‐ray fluorescence spectrometers. Attempts are made to identify specific Raman signatures of the patina to detect similarity in a nondestructive procedure. X‐ray fluorescence measurements allow an identification of two brass artefacts and different types of bronze, including lead‐rich and mixed lead–tin–zinc‐rich compositions. The following phases are identified: CuO, Cu2O, Cu2S, tin oxides, ZnO, Cu3(OH)4SO4, Cu4(OH)6SO4, 3PbOPbSO4 H2O, PbSO4/PbO, Pb(AsO4)3Cl, HgO/HgS. Relics of the mould, retained as concretions at the artefact surface are also identified: TiO2, SiO2, and different soda(−lime) glasses. Patina with very similar colour and habit may have different Raman signatures. This study offers tools to classify the artefacts in a noninvasive way. Copyright © 2011 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 79%

On‐site Raman and XRF analysis of Japanese/Chinese bronze/brass patina – the search for specific Raman signatures

Colomban

Tournié

Maucuer³

et al. 2011

J Raman Spectroscopy

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“…Mishra and co‐workers reported a low‐temperature Raman study in NaNbO 3 in the temperature range 10–300 K to understand the low‐temperature antiferroelectric–ferroelectric phase transition . Oliveira and co‐workers studied phase transitions in the compounds Pb 8 O 5 (XO 4 ) 2 for X═As and V . Sharma et al .…”

Section: Solid‐state Studiesmentioning

confidence: 99%

Recent advances in linear and nonlinear Raman spectroscopy. Part VI

Nafie

2012

J Raman Spectroscopy

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The purpose of this review is to provide a concise overview of recent advances in the broadly defined field of Raman spectroscopy as reflected in part by the many articles published each year in Journal of Raman Spectroscopy as well as in trends across all related journals publishing in this research area. Context for this review is derived from statistical data on article counts obtained from Thomson Reuters ISI Web of Knowledge by year and by subfield of Raman spectroscopy. Additional information is gleaned from presentations featuring Raman spectroscopy presented at the XXIII International Conference on Raman Spectroscopy in Bangalore, India, in August 2012 and at Scientific Exchange 2012 sponsored by the Federation of Analytical Chemistry and Spectroscopy Societies in Kansas City, Missouri, USA, October 2012. Papers published in the Journal of Raman Spectroscopy in 2011 are highlighted in this review and reflect trends at the cutting edge of Raman spectroscopy, a field that is expanding rapidly as a sensitive photonic probe of matter at the molecular level with an ever widening sphere of novel applications. Copyright © 2012 John Wiley & Sons, Ltd.

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Phase transitions in Pb₈O₅(XO₄)₂ (X = As and V) compounds

Cited by 2 publications

References 29 publications

On‐site Raman and XRF analysis of Japanese/Chinese bronze/brass patina – the search for specific Raman signatures

On‐site Raman and XRF analysis of Japanese/Chinese bronze/brass patina – the search for specific Raman signatures

Recent advances in linear and nonlinear Raman spectroscopy. Part VI

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