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Updated: Mar 24, 2026

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
Assessment of Transition Element Speciation in Glasses Using a Portable Transmission
Myrtille Hunault1, Gérald Lelong2, Michel Gauthier2
1Sorbonne Universités, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, Paris, France Laboratoire de Recherche des Monuments Historiques, Centre de la Recherche sur la Conservation, Ministère de la Culture et de la Communication, Sorbonne Universités, Champs-sur-Marne, France myrtille.hunault@impmc.upmc.fr.
Abstract:
A new low-cost experimental setup based on two compact dispersive optical spectrometers has been developed to measure optical absorption transmission spectra over the 350-2500 nm energy range. We demonstrate how near-infrared (NIR) data are essential to identify the coloring species in addition to ultraviolet visible data. After calibration with reference glasses, the use of an original sample stage that maintains the window panel in the vertical position enables the comparison of ancient and modern glasses embedded in a panel from the Sainte-Chapelle of Paris, without any sampling. The spectral resolution enables to observe fine resonances arising in the absorption bands of Cr(3+), and the complementary information obtained in the NIR enables to determine the contribution of Fe(2+), a key indicator of glassmaking conditions.
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