From nanoscale heterogeneities to nanolites: cation clustering in glasses
The structural behavior of cations in multicomponent oxide glasses cannot be described within a random network model, due to the presence of cation clusters that provide original properties. These clustering processes are even observed for cations that may occur at a percent level concentration, whi...
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Académie des sciences
2023-04-01
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| Series: | Comptes Rendus. Physique |
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| Online Access: | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.150/ |
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| author | Cormier, Laurent Galoisy, Laurence Lelong, Gérald Calas, Georges |
| author_facet | Cormier, Laurent Galoisy, Laurence Lelong, Gérald Calas, Georges |
| author_sort | Cormier, Laurent |
| collection | DOAJ |
| description | The structural behavior of cations in multicomponent oxide glasses cannot be described within a random network model, due to the presence of cation clusters that provide original properties. These clustering processes are even observed for cations that may occur at a percent level concentration, which makes it all the more spectacular. In particular, the structural and chemical characteristics of Zr$^{4+}$- and Fe$^{2+}$/Fe$^{3+}$-based clusters in (alumino)silicate glasses illustrate the link between the short-range order around cations and the formation of nanoscale heterogeneities. The structural characteristics of these Zr- or Fe-rich clusters are similar, as both are based on edge-sharing cation polyhedra. Cations may also occur in a network-forming position. In that case, cation sites are corner-linked with the silicate network. In such positioning, Pauling rules and local charge balance requirements will favor cations be diluted at a nanoscale. The topological constraints of these two types of local structure are stronger for the former than for the latter, as disorder effects are smaller for edge-sharing than for corner-sharing polyhedra. This may explain crystal nucleation during the growth of such ordered heterogeneities, giving rise to original properties that are illustrated in a large diversity of glassy materials encompassing high-tech glass-ceramics and volcanic glasses. |
| format | Article |
| id | doaj-art-1b4598d38c304fb69abf1f084ff04746 |
| institution | Kabale University |
| issn | 1878-1535 |
| language | English |
| publishDate | 2023-04-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Physique |
| spelling | doaj-art-1b4598d38c304fb69abf1f084ff047462025-02-07T13:52:27ZengAcadémie des sciencesComptes Rendus. Physique1878-15352023-04-0124S119921410.5802/crphys.15010.5802/crphys.150From nanoscale heterogeneities to nanolites: cation clustering in glassesCormier, Laurent0https://orcid.org/0000-0002-3554-0707Galoisy, Laurence1https://orcid.org/0000-0001-5244-5851Lelong, Gérald2https://orcid.org/0000-0002-3561-8228Calas, Georges3https://orcid.org/0000-0003-0525-5734Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC) (Sorbonne Université, CNRS UMR 7590, Muséum national d’Histoire naturelle, IRD UMR 206), 4 place Jussieu, 75005 Paris, FranceInstitut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC) (Sorbonne Université, CNRS UMR 7590, Muséum national d’Histoire naturelle, IRD UMR 206), 4 place Jussieu, 75005 Paris, FranceInstitut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC) (Sorbonne Université, CNRS UMR 7590, Muséum national d’Histoire naturelle, IRD UMR 206), 4 place Jussieu, 75005 Paris, FranceInstitut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC) (Sorbonne Université, CNRS UMR 7590, Muséum national d’Histoire naturelle, IRD UMR 206), 4 place Jussieu, 75005 Paris, FranceThe structural behavior of cations in multicomponent oxide glasses cannot be described within a random network model, due to the presence of cation clusters that provide original properties. These clustering processes are even observed for cations that may occur at a percent level concentration, which makes it all the more spectacular. In particular, the structural and chemical characteristics of Zr$^{4+}$- and Fe$^{2+}$/Fe$^{3+}$-based clusters in (alumino)silicate glasses illustrate the link between the short-range order around cations and the formation of nanoscale heterogeneities. The structural characteristics of these Zr- or Fe-rich clusters are similar, as both are based on edge-sharing cation polyhedra. Cations may also occur in a network-forming position. In that case, cation sites are corner-linked with the silicate network. In such positioning, Pauling rules and local charge balance requirements will favor cations be diluted at a nanoscale. The topological constraints of these two types of local structure are stronger for the former than for the latter, as disorder effects are smaller for edge-sharing than for corner-sharing polyhedra. This may explain crystal nucleation during the growth of such ordered heterogeneities, giving rise to original properties that are illustrated in a large diversity of glassy materials encompassing high-tech glass-ceramics and volcanic glasses.https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.150/GlassStructureHeterogeneitiesNucleationSpectrocopy |
| spellingShingle | Cormier, Laurent Galoisy, Laurence Lelong, Gérald Calas, Georges From nanoscale heterogeneities to nanolites: cation clustering in glasses Comptes Rendus. Physique Glass Structure Heterogeneities Nucleation Spectrocopy |
| title | From nanoscale heterogeneities to nanolites: cation clustering in glasses |
| title_full | From nanoscale heterogeneities to nanolites: cation clustering in glasses |
| title_fullStr | From nanoscale heterogeneities to nanolites: cation clustering in glasses |
| title_full_unstemmed | From nanoscale heterogeneities to nanolites: cation clustering in glasses |
| title_short | From nanoscale heterogeneities to nanolites: cation clustering in glasses |
| title_sort | from nanoscale heterogeneities to nanolites cation clustering in glasses |
| topic | Glass Structure Heterogeneities Nucleation Spectrocopy |
| url | https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.150/ |
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