An unusual O2-/F- distribution in the new pyrochlore oxyfluorides: Na2B2O5F2 (B = Nb, Ta)

Edouard Boivin; Frédérique Pourpoint; Sébastien Saitzek; Pardis Simon; Pascal Roussel; Houria Kabbour

doi:10.1039/d1cc06760e

An unusual O^2-/F^- distribution in the new pyrochlore oxyfluorides: Na₂B₂O₅F₂ (B = Nb, Ta)

Chem Commun (Camb). 2022 Feb 15;58(14):2391-2394. doi: 10.1039/d1cc06760e.

Authors

Edouard Boivin¹, Frédérique Pourpoint¹, Sébastien Saitzek¹, Pardis Simon¹, Pascal Roussel¹, Houria Kabbour¹

Affiliation

¹ Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide, F-59000 Lille, France. houria.kabbour@univ-lille.fr.

PMID: 35083478
DOI: 10.1039/d1cc06760e

Abstract

Two new oxyfluorides with a pyrochlore-type structure, Na₂Nb₂O₅F₂ and Na₂Ta₂O₅F₂, have been obtained, for which the XRD crystallographic study coupled with ¹⁹F solid state NMR reveals an unusual O/F distribution. Both materials are n-type semiconductors exhibiting photoconductive properties.