The assessment of the penetration depth of conservation treatments applied to cultural heritage stone materials is a burning issue in conservation science. Several analytical approaches have been proposed but, at present, many of them are not fully exhaustive to define in a direct way the composition and location of the conservation products formed after inorganic mineral treatments. Here, we explored, for the first time, the analytical capability of synchrotron radiation m X-ray diffraction in transmission geometry (SR-mTXRD) for the study of the crystal chemistry and penetration depth of the consolidating phases formed after the application of diammonium hydrogen phosphate (DAP) treatments on a porous carbonatic stone (Noto limestone). The SR-mTXRD approach provided unambiguous information on the nature of the newly formed calcium phosphates (hydroxyapatite, HAP, and octacalcium phosphate, OCP) with depth, supplying important indications of the diffusion mechanism and the reactivity of the substrate. Qualitative and semi-quantitative data were obtained at the microscale with a non-destructive protocol and an outstanding signal-to-noise ratio. The SR-mTXRD approach opens a new analytical scenario for the investigation of a wide range of cultural heritage materials, including natural and artificial stone materials, painted stratigraphies, metals, glasses and their decay products. Furthermore, it can potentially be used to characterize the penetration depth of a phase “A” (or more crystalline phases) in a matrix “B” also beyond the cultural heritage field, demonstrating the potential wide impact of the study.
Synchrotron radiation μ X-ray diffraction in transmission geometry for investigating the penetration depth of conservation treatments on cultural heritage stone materials / E. Possenti, C. Conti, G.D. Gatta, M. Merlini, M. Realini, C. Colombo. - In: ANALYTICAL METHODS. - ISSN 1759-9660. - 12:12(2020 Mar 28), pp. 1587-1594.
|Titolo:||Synchrotron radiation μ X-ray diffraction in transmission geometry for investigating the penetration depth of conservation treatments on cultural heritage stone materials|
GATTA, GIACOMO DIEGO [Membro del Collaboration Group]
MERLINI, MARCO [Membro del Collaboration Group]
|Parole Chiave:||Synchrotron radiation X-ray diffraction; conservation treatments; cultural heritage stone materials|
|Settore Scientifico Disciplinare:||Settore GEO/09 - Georisorse Miner.Appl.Mineral.-Petrogr.per l'amb.e i Beni Cul|
|Progetto:||Dipartimenti di Eccellenza 2018-2022 - Dipartimento di SCIENZE DELLA TERRA "ARDITO DESIO"|
|Data di pubblicazione:||28-mar-2020|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1039/D0AY00010H|
|Appare nelle tipologie:||01 - Articolo su periodico|
File in questo prodotto:
|Possenti_AnalyticalMethods-2020.pdf||Pre-print (versione accettata per la pubblicazione)||Pre-print (manoscritto inviato all'editore)||Open Access Visualizza/Apri|
|Possenti_AnalyticalMthods_2020.pdf||Versione pubblicata dall'editore||Publisher's version/PDF||Administrator Richiedi una copia|