Synthesis of the Double Infinite-Layer Ni(I) Phase La₃Ni₂O₅F via Sequential Topochemical Reactions.

ABSTRACT: Fluorination of the n = 2 Ruddlesden-Popper oxide, La₃Ni₂O₇, with polyvinylidene fluoride yields La₃Ni₂O₅F₄, a phase in which fluoride ions have been inserted into interstitial sites in the Ruddlesden-Popper framework and also exchanged with the oxide ions residing on apical anion sites. Reaction with LiH at 190 °C reduces La₃Ni₂O₅F₄ by extracting interstitial fluoride ions. The resulting phase, La₃Ni₂O₅F₃, adopts a structure described in space group Pbcm in which the fluoride ions in the half-filled interstitial layer are arranged in chains parallel to the y-axis, and the NiO₅F octahedra adopt a

SUBMITTER: Wernert R 

PROVIDER: S-EPMC12921833 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature