Synthesis of new Ln₄(Al₂O₆F₂)O₂ (Ln = Sm, Eu, Gd) phases with a cuspidine-related structure.

ABSTRACT: The first fluorination of the cuspidine-related phases of Ln₄(Al₂O₇□)O₂ (where Ln = Sm, Eu, Gd) is reported. A low-temperature reaction with poly(vinyl-idene difluoride) lead to the fluorine being substituted in place of oxygen and inserted into the vacant position between the dialuminate groups. X-ray photoelectron spectroscopy shows the presence of the F 1s photoelectron together with an increase in Al 2p and rare-earth 4d binding energies supporting F incorporation. Energy-dispersive X-ray spectroscopy analyses are consistent with the formula Ln₄(Al₂O₆F₂)O₂, confirming that substitution of one oxygen by two fluoride atoms has been achieved. Rietveld refinements show an

SUBMITTER: Moran-Ruiz A 

PROVIDER: S-EPMC6327175 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature