Early stage of weathering of medieval-like potash–lime model glass: evaluation of key factors

Gentaz, Lucile; Lombardo, Tiziana; Loisel, Catherine; Chabas, Anne; Vallotto, Marta

doi:10.1007/s11356-010-0370-7

Cited by 40 publications

(33 citation statements)

References 16 publications

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“…The effects of weathering on the quantitative analysis for ancient glass have been discussed much . In order to decrease this kind of effect, the original surfaces of all samples studied in this paper are cleaned by a small diamond file to explore a fresh area before measurement.…”

Section: Methodsmentioning

confidence: 99%

“…The effects of weathering on the quantitative analysis for ancient glass have been discussed much. [32,33] In order to decrease this kind of effect, the original surfaces of all samples studied in this paper are cleaned by a small diamond file to explore a fresh area before measurement. About 100-μm-thick weathered surfaces are eliminated, and the weathering effects on the quantitative analysis for ancient glass are greatly reduced.…”

Section: Methodsmentioning

confidence: 99%

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Application of a portable XRF spectrometer for classification of potash glass beads unearthed from tombs of Han Dynasty in Guangxi, China

Liu

et al. 2013

X-Ray Spectrometry

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Thirty-seven glass beads excavated from the Han Dynasty tombs in Hepu county, Guangxi, China, were analyzed using a portable X-ray fluorescence (PXRF) spectrometer. Reference sample Corning glass D is used to check precision and accuracy of the equipment for major and minor components. The results of inductively coupled plasma atomic emission spectroscopy and PXRF are compared to evaluate the quality of equipment for trace elements. Combined with the contents of Al 2 O 3 and CaO, a new criterion of subgroup division for potash glass based on the levels of trace elements (Rb and Sr) is proposed. The correlations of Rb and K, Rb and Al, and Sr and Ca are discussed. It is thought that saltpeter was the main flux used to produce potash glasses of different groups. The positive correlation between Rb and Al, and Rb and K indicates that potassium aluminosilicate minerals may be used as raw minerals for potash glasses of group II. The results indicate that the levels of Rb and Sr can be very helpful in subgroup definition and provide useful clues to the raw materials used for glassmaking and provenance study of the potash glass found in Guangxi, China.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Application of a portable XRF spectrometer for classification of potash glass beads unearthed from tombs of Han Dynasty in Guangxi, China

Liu

et al. 2013

X-Ray Spectrometry

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“…Data are provided on the chemical, physical, and structural characterization of these chemically complex glass systems, which have not yet been thoroughly investigated. Previous studies, in fact, were focused either on binary/ternary systems [12,13,[22][23][24] or even on more complex systems [12,20,23,[25][26][27][28]. However, in these cases the glass was usually produced for weathering experiments and its characterization was often not reported in an exhaustive way.…”

Section: Introductionmentioning

confidence: 99%

Structural and vibrational characterization of medieval like glass samples

Ferri

Bersani

Lorenzi

et al. 2012

Journal of Non-Crystalline Solids

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“…[30][31][32] Their alteration layers are often very heterogeneous (in composition and structure 31,33,34 ) and fractured due to the wetting/drying cycles conditions. 33,35,36 The crack network includes cracks parallel to the surface that are generally filled with secondary phases (sulfates or carbonates) and unfilled perpendicular ones, so that water circulation can still occur within the altered layer up to the pristine glass interface. 35 Moreover, the exfoliation or detachment of altered glass scales can expose new surfaces to the atmosphere.…”

Section: +mentioning

confidence: 99%

Long-term weathering rate of stained-glass windows using H and O isotopes

et al. 2018

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The understanding of glass alteration is a biogeochemical, industrial, societal (radioactive waste confinement), and cultural heritage issue. Studies have been mainly performed in aqueous conditions. However, glass reactivity under hydraulically unsaturated conditions may be more important than previously recognized. In this context, we evaluate here the role of the alteration layer formed on medieval stained-glass windows on the ongoing alteration in unsaturated conditions. H 2 O adsorption isotherms were measured to study the relation between the vapor sorption and the relative humidity inside the alteration layer. From it, the average pore radius was calculated, yielding a water vapor diffusion coefficient of 7.8 × 10 -7 m² s -1 inside the pore network. Experiments using doped water vapor (D 2 18 O) confirm the vapor transport up to the alteration front via fractures and pore network. They also demonstrate that the alteration mainly progresses via an interdiffusion mechanism. The calculated interdiffusion coefficients at 20°C are 3.6 × 10 -20 m 2 s -1 at 70% RH and 4.9 × 10 -20 m 2 s -1 at 90% RH, which is similar to the values measured on model stained-glass samples altered in short durations (1-4 years). Therefore, this study highlights that, given its morphology, the alteration layer is not protective against vapor transport and interdiffusion.

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Early stage of weathering of medieval-like potash–lime model glass: evaluation of key factors

Abstract: Those results show that the role played by dry deposition, even if less important than that of the wet deposition, cannot be neglected.

Cited by 40 publications

References 16 publications

Application of a portable XRF spectrometer for classification of potash glass beads unearthed from tombs of Han Dynasty in Guangxi, China

Application of a portable XRF spectrometer for classification of potash glass beads unearthed from tombs of Han Dynasty in Guangxi, China

Structural and vibrational characterization of medieval like glass samples

Long-term weathering rate of stained-glass windows using H and O isotopes

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