PbFePO4F2 with a 1/6th bond depleted triangular lattice

Hongcheng Lu; Hiroshi Kageyama

doi:10.1039/c8dt03802c

PbFePO₄F₂ with a 1/6th bond depleted triangular lattice

Dalton Trans. 2018 Nov 21;47(43):15303-15306. doi: 10.1039/c8dt03802c. Epub 2018 Oct 17.

Authors

Hongcheng Lu¹, Hiroshi Kageyama

Affiliation

¹ Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan. kage@scl.kyoto-u.ac.jp.

PMID: 30328443
DOI: 10.1039/c8dt03802c

Abstract

We hydrothermally synthesized a layered PbFePO₄F₂ (P2₁/n). Fe³⁺ cations (S = 5/2) within the layer are connected via F^- and (PO₄)^3- anions to give a novel (distorted) 1/6th bond depleted triangular lattice. The χ(T) suggests strong antiferromagnetic interactions with a Weiss constant of -125 K, but geometrical frustration and low dimensionality appear to prohibit a long-range order down to 23 K.