Water Transport within Ancient Stained Glass Alteration Layer using Oxygen Isotopes

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• 作者：Loryelle Sessegolo^a ; ^{loryelle.sessegolo@lisa.u-pec.fr} ; Auré ; lie Verney-Carron^a ; Mandana Saheb^a ; Laurent Remusat^b ; Adriana Gonzalez-Cano^b ; Claudine Loisel^c ; Anne Chabas^a
• 关键词：alteration ; silicate glass ; oxygen isotopes
• 刊名：Procedia Earth and Planetary Science
• 出版年：2017
• 出版时间：2017
• 年：2017
• 卷：17
• 期：Complete
• 页码：814-817
• 全文大小：330 K
• 卷排序：17

文摘

Stained glass windows belong to the cultural heritage and require to be preserved. In order to determine their long-term alteration rates in atmospheric medium, it is necessary to assess the kinetic role of the alteration layer. For this purpose, ancient stained glass samples were exposed to different relative humidity levels. In order to determine the water penetration front and possible reactions between water and altered or pristine glass, the water vapor was doped in H218O and samples were analyzed using NanoSIMS mapping. The results show that the water penetration is homogeneous for all samples, regardless of the relative humidity and the time of exposure (1 day or 2 months). However, higher the relative humidity is, higher is the δ18O in the altered layer, which demonstrates that this isotopic tracer is suitable to assess the quantity of condensed water within the altered glass. Moreover, the morphology of the alteration layer does not influence the δ18O for a same relative humidity. At last, even if the alteration layer is rapidly soaked with water (less than one day) no resumption of alteration can be observed at the interface with the bulk glass.