@article {heritage1020025,
	title = {The Influence of Environment in the Alteration of the Stained-Glass Windows in Portuguese Monuments},
	journal = {Heritage},
	volume = {1},
	number = {2},
	year = {2018},
	note = {n/a},
	pages = {365{\textendash}376},
	abstract = {<p>This work presents the results of the exposure of soda-lime, potash-lime and mixed-alkali silicate glasses during ten and twenty months in different Portuguese monuments with historical stained-glass windows to characterize the influence of local environmental conditions. The glass samples were exposed in the Monastery of Batalha (Batalha), the Monastery of Jer{\'o}nimos (Lisbon), and the Cathedral of {\'E}vora ({\'E}vora). A set of analytical techniques to assess the physicochemical effects were used, including optical microscopy and Fourier transform infrared spectroscopy. All the samples presented crystalline deposits on their surface; however, their quantity and nature depended on the atmospheric conditions during the days before the collection. Potash-lime silicate glass was the most altered glass in comparison with soda-lime and mixed-alkali silicate glasses. The samples from the Cathedral of {\'E}vora showed a high content of dust and salts on their surface but without severe chemical pathologies; however, those samples exposed in the Monastery of Jer{\'o}nimos and the Monastery of Batalha presented alteration layers due to a high humidity environment.</p>
},
	issn = {2571-9408},
	doi = {10.3390/heritage1020025},
	url = {http://www.mdpi.com/2571-9408/1/2/25},
	author = {Teresa Palomar and Pedro Redol and Cruz Almeida, Isabel and Pereira da Silva, Eduardo and Vilarigues, Marcia}
}
