Publications

Authors:

Cassetta, Michele; Giannetta, Beatrice; Enrichi, Francesco; Zaccone, Claudio; Mariotto, Gino; Giarola, Marco; Nodari, Luca; Zanatta, Marco; Daldosso, Nicola

Title:

Effect of the alkali vs. iron ratio on glass transition temperature and vibrational properties of synthetic basalt-like glasses

Year:

2023

Type of item:

Articolo in Rivista

Tipologia ANVUR:

Articolo su rivista

Language:

Inglese

Format:

A Stampa

Referee:

Sì

Name of journal:

Spectrochimimica Acta, Part A

ISSN of journal:

1386-1425

N° Volume:

293

Page numbers:

1-9

Keyword:

basalt-like glasses, glass transition, boson peak, iron, alkali

Short description of contents:

Volcanic eruptions generate huge amounts of material with a wide range of compositions and therefore different physicochemical properties. We present a combined Raman and calorimetric study carried out on four synthetic basaltic glasses with different alkali vs. iron ratio which spans the typical compositions of basalts on Earth. Differential scanning calorimetry shows that changes of this ratio modify the glass transition interval whereas Raman spectra allow to gain insight about the structure of the glass in the microscopic and macroscopic range. Indeed, our Raman analysis is extended from the high frequency region, characterized by the molecular peaks, to the very low frequency region where glasses exhibit the boson peak. Spectra show a variation of the non-bridging oxygens number that affects the medium range order of the glass and the network interconnections. In the considered substitution interval, the boson peak shape is conserved while its position shift upwards. This means that increasing the alkali vs. iron content the elastic medium hardens but it does not change nature. This study emphasizes the importance of considering the full-range spectra when analysing multicomponent or natural systems with small chemical variations.

Web page:

https://doi.org/10.1016/j.saa.2023.122430

Product ID:

131704

Handle IRIS:

11562/1084828

Last Modified:

January 25, 2025

Bibliographic citation:

Cassetta, Michele; Giannetta, Beatrice; Enrichi, Francesco; Zaccone, Claudio; Mariotto, Gino; Giarola, Marco; Nodari, Luca; Zanatta, Marco; Daldosso, Nicola, Effect of the alkali vs. iron ratio on glass transition temperature and vibrational properties of synthetic basalt-like glasses «Spectrochimimica Acta, Part A» , vol. 293 , 2023 , pp. 1-9

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