Micro- and Nanoscale Surface Analysis of Late Iron Age Glass from Broborg, a Vitrified Swedish Hillfort
Micro- and Nanoscale Surface Analysis of Late Iron Age Glass from Broborg, a Vitrified Swedish Hillfort
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对瑞典 Hillfort 玻璃化工厂 Broborg 的铁器时代晚期玻璃进行微米和纳米级表面分析
DOI：
10.1093/micmic/ozac032
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发表时间：
2023
影响因子：
2.8
通讯作者：
Matthews B
中科院分区：
文献类型：
--
作者：
Matthews B
长期暴露于环境中的地球化学过程的考古玻璃可用于了解玻璃蚀变，这对玻璃化核废料的安全处置很重要。具有不同化学性质的镁铁质和长英质玻璃的样品，由熔融的角闪质和花岗岩形成，从瑞典铁器时代的丘陵地带Broborg获得。从山顶堡垒墙的顶部和墙的内部挖掘出了玻璃。对这些玻璃进行了详细的显微镜、光谱和衍射研究，研究了表面结构和化学成分。长英质玻璃的化学性质是均匀的，光滑的表面显示出有限的化学变化（<150 nm），与壁中的位置无关。 镁铁质玻璃是异质的，在玻璃基质中有辉石、尖晶石、长石和石英晶体。与表土接触的镁铁质玻璃表面比壁内的表面更粗糙，并且含有与微生物定植一致的富碳物质。发现了镁铁质玻璃化学或物理改变的有限证据;覆盖所有暴露表面的薄熔融膜保持完整，尽管暴露于水力不饱和条件，表土和相关微生物组超过1，500年。这支持了铝硅酸盐核废料玻璃在近地表处置设施中具有高化学耐久性的假设。
Archaeological glasses with prolonged exposure to biogeochemical processes in the environment can be used to understand glass alteration, which is important for the safe disposal of vitrified nuclear waste. Samples of mafic and felsic glasses with different chemistries, formed from melting amphibolitic and granitoid rocks, were obtained from Broborg, a Swedish Iron Age hillfort. Glasses were excavated from the top of the hillfort wall and from the wall interior. A detailed microscopic, spectroscopic, and diffraction study of surficial textures and chemistries were conducted on these glasses. Felsic glass chemistry was uniform, with a smooth surface showing limited chemical alteration (<150 nm), irrespective of the position in the wall. Mafic glass was heterogeneous, with pyroxene, spinel, feldspar, and quartz crystals in the glassy matrix. Mafic glass surfaces in contact with topsoil were rougher than those within the wall and had carbon-rich material consistent with microbial colonization. Limited evidence for chemical or physical alteration of mafic glass was found; the thin melt film that coated all exposed surfaces remained intact, despite exposure to hydraulically unsaturated conditions, topsoil, and associated microbiome for over 1,500 years. This supports the assumption that aluminosilicate nuclear waste glasses will have a high chemical durability in near-surface disposal facilities.
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影响因子：
5
作者：
E. Pierce;L. R. Reed;W. Shaw;B. McGrail;J. Icenhower;C. Windisch;E. Cordova;J. Broady
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DOI：
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2016
影响因子：
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作者：
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影响因子：
2.5
作者：
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3.5
作者：
T. Palomar;A. Chabas;D. Bastidas;D. Fuente;A. Verney-Carron
通讯作者：
T. Palomar;A. Chabas;D. Bastidas;D. Fuente;A. Verney-Carron
影响因子：
3.7
作者：
Cockell, C. S.;Olsson-Francis, K.;Meunier, A.
通讯作者：
Meunier, A.