Massinelli G, Marinoni N, Colombo C, Gatta G D, Realini M, Burghammer M, Possenti E
Dipartimento di Scienze della Terra "Ardito Desio", Università degli Studi di Milano, Via Botticelli 23, 20133, Milan, Italy.
Istituto di Scienze del Patrimonio Culturale (ISPC), Consiglio Nazionale delle Ricerche (CNR), Via R. Cozzi 53, 20125, Milano, Italy.
Sci Rep. 2024 Apr 20;14(1):9108. doi: 10.1038/s41598-024-58718-z.
Understanding the effects of consolidating inorganic mineral treatments on carbonate stones of cultural heritage, and on the nature and distribution of newly formed products within the matrix, poses a significant challenge in Heritage Science and Conservation Science. Existing analytical methods often fail to deliver spatial and compositional insights into the newly formed crystalline phases with the appropriate high lateral resolution. In this study, we explore the capabilities and limitations of synchrotron radiation (SR) micro-X-ray powder diffraction (μXRPD) mapping combined with micro-X-ray fluorescence (μXRF) to give insight into compounds formed following the application of ammonium oxalate (AmOx) and diammonium phosphate-based (DAP) solutions on porous carbonate stone. Ultimately, the integration of μXRPD mapping and μXRF analysis proved itself a powerful asset in providing precise qualitative and quantitative data on the newly formed phases, in the case of both calcium oxalates (CaOxs) and calcium phosphates (CaPs), and their complex stratigraphic distribution, thus opening a new route for applications to a more comprehensive study of inorganic treatments applied to carbonate substrates.
了解无机矿物加固处理对文化遗产碳酸盐石材的影响，以及对基质中新形成产物的性质和分布的影响，是遗产科学和保护科学面临的一项重大挑战。现有的分析方法往往无法以适当的高横向分辨率提供关于新形成晶相的空间和成分信息。在本研究中，我们探索了同步辐射（SR）微X射线粉末衍射（μXRPD）映射与微X射线荧光（μXRF）相结合的能力和局限性，以深入了解在多孔碳酸盐石材上施加草酸铵（AmOx）和磷酸二铵基（DAP）溶液后形成的化合物。最终，在草酸钙（CaOxs）和磷酸钙（CaPs）的情况下，μXRPD映射和μXRF分析的结合证明了自身是一种强大的工具，可提供关于新形成相的精确定性和定量数据，以及它们复杂的地层分布，从而为更全面研究应用于碳酸盐基质的无机处理开辟了一条新途径。
