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Doux, J.-M., Stephant, N., La Salle, A. L. G., Joubert, O., Guyomard, D. & Quarez, E. (2019) New KRb2Sb4BO13 and Rb3Sb4BO13 compounds prepared by Rb+/K+ ion exchange from the K3Sb4BO13 ion conductor. Crystengcomm, 21 594–601.
Added by: Richard Baschera (2019-02-15 10:21:58) Last edited by: Richard Baschera (2019-02-15 10:23:50) |
| Type de référence: Article DOI: 10.1039/c8ce01712c Clé BibTeX: Doux2019 Voir tous les détails bibliographiques  |
Catégories: IMN, ST2E Créateurs: Doux, Guyomard, Joubert, La Salle, Quarez, Stephant Collection: Crystengcomm |
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| Résumé |
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The crystal structures of new K3-xRbxSb4BO13 compounds (x = 2, 3), prepared via ion exchange from K3Sb4BO13, are reported. They adopt the triclinic crystal system and exhibit a localized Rb/K disorder at room temperature. The crystal structures were determined from single-crystal X-ray diffraction at T = 25 degrees C for both end-members of the family, leading to a reinvestigation of the K3Sb4BO13 crystal structure, and one intermediate composition KRb2Sb4BO13. The structure consists of hexagonal Sb3O9 bronze-like layers alternately separated by edge-sharing Sb2O10 dimers and BO3 triangles, forming interconnected tunnels filled by Rb+/K+ ions. The differences between the structures are based on the Rb/K disorder inside the tunnels conferring an advanced view of the cation diffusion paths. Additional information about conduction pathways was provided by the bond valence energy landscape (BVEL) method.
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