An integrated spectroscopic approach for the identification of what distinguishes Afghan lapis lazuli from others

Mauro Bacci; Costanza Cucci; Eleonora Del Federico; Andrea Ienco; Alexej Jerschow; Jacob M. Newman; Marcello Picollo

doi:10.1016/j.vibspec.2008.05.002

An integrated spectroscopic approach for the identification of what distinguishes Afghan lapis lazuli from others

Mauro Bacci, Costanza Cucci, Eleonora Del Federico, Andrea Ienco, Alexej Jerschow, Jacob M. Newman, Marcello Picollo

Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

Afghan lapis lazuli, the source of precious Medieval and Renaissance blue, is known to show a distinctive absorption band in vibrational spectra, which is not present in other natural or artificial ultramarines. Despite the interest of this finding for geochemistry, gemology, history of art and forgery detection, an explanation for these differences has so far been lacking. In this work, we provide evidence based on solid-state NMR spectroscopy together with electronic/vibrational spectroscopy and theoretical models for the occurrence of diamagnetic species HS₃^- in the lattice of Afghan lapis lazuli, to which these absorption bands may be attributed. This result, apart from allowing one to authenticate the precious Afghan stone, may help in describing the geochemical origin of lapis lazuli in the different Earth regions.

Original language	English (US)
Pages (from-to)	80-83
Number of pages	4
Journal	Vibrational spectroscopy
Volume	49
Issue number	1
DOIs	https://doi.org/10.1016/j.vibspec.2008.05.002
State	Published - Jan 22 2009

Keywords

DFT calculations
Electronic spectroscopy
HS
Lapis lazuli
Ultramarine
Vibrational spectroscopy

ASJC Scopus subject areas

Spectroscopy

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10.1016/j.vibspec.2008.05.002

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title = "An integrated spectroscopic approach for the identification of what distinguishes Afghan lapis lazuli from others",

abstract = "Afghan lapis lazuli, the source of precious Medieval and Renaissance blue, is known to show a distinctive absorption band in vibrational spectra, which is not present in other natural or artificial ultramarines. Despite the interest of this finding for geochemistry, gemology, history of art and forgery detection, an explanation for these differences has so far been lacking. In this work, we provide evidence based on solid-state NMR spectroscopy together with electronic/vibrational spectroscopy and theoretical models for the occurrence of diamagnetic species HS3- in the lattice of Afghan lapis lazuli, to which these absorption bands may be attributed. This result, apart from allowing one to authenticate the precious Afghan stone, may help in describing the geochemical origin of lapis lazuli in the different Earth regions.",

keywords = "DFT calculations, Electronic spectroscopy, HS, Lapis lazuli, Ultramarine, Vibrational spectroscopy",

author = "Mauro Bacci and Costanza Cucci and {Del Federico}, Eleonora and Andrea Ienco and Alexej Jerschow and Newman, {Jacob M.} and Marcello Picollo",

note = "Funding Information: We thank Prof. Emilio Castellucci and Dr. Cristiana Lofrumento, Department of Chemistry, University of Florence (Italy) for their help in recording Raman spectra; Prof. Maria Luce Frezzotti, Department of Earth Sciences, University of Siena (Italy), who provided us with the samples of peridotites with inclusions of CO 2 . A.J. acknowledges support from the NSF (CHE-0554400) and the Kress Foundation. Copyright: Copyright 2009 Elsevier B.V., All rights reserved.",

year = "2009",

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doi = "10.1016/j.vibspec.2008.05.002",

language = "English (US)",

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AU - Bacci, Mauro

AU - Cucci, Costanza

AU - Del Federico, Eleonora

AU - Ienco, Andrea

AU - Jerschow, Alexej

AU - Newman, Jacob M.

AU - Picollo, Marcello

N1 - Funding Information: We thank Prof. Emilio Castellucci and Dr. Cristiana Lofrumento, Department of Chemistry, University of Florence (Italy) for their help in recording Raman spectra; Prof. Maria Luce Frezzotti, Department of Earth Sciences, University of Siena (Italy), who provided us with the samples of peridotites with inclusions of CO 2 . A.J. acknowledges support from the NSF (CHE-0554400) and the Kress Foundation. Copyright: Copyright 2009 Elsevier B.V., All rights reserved.

PY - 2009/1/22

Y1 - 2009/1/22

N2 - Afghan lapis lazuli, the source of precious Medieval and Renaissance blue, is known to show a distinctive absorption band in vibrational spectra, which is not present in other natural or artificial ultramarines. Despite the interest of this finding for geochemistry, gemology, history of art and forgery detection, an explanation for these differences has so far been lacking. In this work, we provide evidence based on solid-state NMR spectroscopy together with electronic/vibrational spectroscopy and theoretical models for the occurrence of diamagnetic species HS3- in the lattice of Afghan lapis lazuli, to which these absorption bands may be attributed. This result, apart from allowing one to authenticate the precious Afghan stone, may help in describing the geochemical origin of lapis lazuli in the different Earth regions.

AB - Afghan lapis lazuli, the source of precious Medieval and Renaissance blue, is known to show a distinctive absorption band in vibrational spectra, which is not present in other natural or artificial ultramarines. Despite the interest of this finding for geochemistry, gemology, history of art and forgery detection, an explanation for these differences has so far been lacking. In this work, we provide evidence based on solid-state NMR spectroscopy together with electronic/vibrational spectroscopy and theoretical models for the occurrence of diamagnetic species HS3- in the lattice of Afghan lapis lazuli, to which these absorption bands may be attributed. This result, apart from allowing one to authenticate the precious Afghan stone, may help in describing the geochemical origin of lapis lazuli in the different Earth regions.

KW - DFT calculations

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KW - Ultramarine

KW - Vibrational spectroscopy

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An integrated spectroscopic approach for the identification of what distinguishes Afghan lapis lazuli from others

Abstract

Keywords

ASJC Scopus subject areas

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