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Rare Alkali Elements as Markers of Local Glass Working in Medieval Tolmo de Minateda (Spain)

Rare Alkali Elements as Markers of Local Glass Working in Medieval Tolmo de Minateda (Spain) Analytical data of Roman and early Islamic glass established several primary glass production groups linked to glassmaking centres in the Levant and in Egypt. In contrast, the activities of secondary glass workshops are largely invisible in the compositional fingerprint of first millennium glass. Laser ablation inductively coupled plasma mass spectrometry (LA‐ICP‐MS) of 261 glass finds from the Visigothic settlement of Tolmo de Minateda (Spain) revealed a site‐specific contamination pattern due to secondary glass processing and recycling, namely the enrichment of the glass batch by a unique combination of rare alkali elements (Li, K, Rb, Cs). With a median of 21 ppm, Li is particularly distinctive. Elevated lithium contents (Li>30 ppm) are also one of the characteristic features of Iberian plant ash glass from the Islamic period. The earliest known examples of this type of glass were found among the ninth‐century remains from Tolmo. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png ChemPlusChem Wiley

Rare Alkali Elements as Markers of Local Glass Working in Medieval Tolmo de Minateda (Spain)

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References (45)

Publisher
Wiley
Copyright
© 2022 Wiley‐VCH GmbH
eISSN
2192-6506
DOI
10.1002/cplu.202200147
Publisher site
See Article on Publisher Site

Abstract

Analytical data of Roman and early Islamic glass established several primary glass production groups linked to glassmaking centres in the Levant and in Egypt. In contrast, the activities of secondary glass workshops are largely invisible in the compositional fingerprint of first millennium glass. Laser ablation inductively coupled plasma mass spectrometry (LA‐ICP‐MS) of 261 glass finds from the Visigothic settlement of Tolmo de Minateda (Spain) revealed a site‐specific contamination pattern due to secondary glass processing and recycling, namely the enrichment of the glass batch by a unique combination of rare alkali elements (Li, K, Rb, Cs). With a median of 21 ppm, Li is particularly distinctive. Elevated lithium contents (Li>30 ppm) are also one of the characteristic features of Iberian plant ash glass from the Islamic period. The earliest known examples of this type of glass were found among the ninth‐century remains from Tolmo.

Journal

ChemPlusChem – Wiley

Published: Sep 1, 2022

Keywords: glass recycling; heritage science; lithium contamination; potassium; Roman glass

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