Features of the crystal structure of 2D honeycomb frustrated magnet Li 2 Ni 2 TeO 6

A. E. Susloparova; Суслопарова А. Е.; N. S. Fokin; Фокин Н. С.; A. I. Kurbakov; Курбаков А. И.

doi:10.31857/S0367676523702733

Features of the crystal structure of 2D honeycomb frustrated magnet Li₂Ni₂TeO₆

Authors: Susloparova A.E.¹, Fokin N.S.¹, Kurbakov A.I.¹
Affiliations:
1. Konstantinov Petersburg Nuclear Physics Institute, National Research Center “Kurchatov Institute”
Issue: Vol 87, No 11 (2023)
Pages: 1574-1579
Section: Articles
URL: https://ruspoj.com/0367-6765/article/view/654556
DOI: https://doi.org/10.31857/S0367676523702733
EDN: https://elibrary.ru/EIIJKT
ID: 654556

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Abstract

Using neutron powder diffraction at a temperature of 35 K, slightly above the Neel temperature, the features of the crystal structure of two samples of layered honeycomb oxides of the same stoichiometric composition Li₂Ni₂TeO₆ synthesized from precursors, Na₂Ni₂TeO₆ and K₂Ni₂TeO₆, were determined. They have a similar crystal structure, hexagonal space group P63/mcm, structure type P2, but there is a significant difference in the distances between the layers. Both Li₂Ni₂TeO₆ samples crystallize into the orthorhombic space group Cmca, with minor differences in the unit lattice parameters. If Li₂Ni₂TeO₆ from the potassium precursor is single-phase, then the compound from the sodium precursor contains 16 wt % of an additional phase with the same Li₂Ni₂TeO₆ stoichiometry, but more deformed with monoclinic distortions described by the С2/m space group.

Keywords

neutron powder diffraction, full-profile analysis, quasi-two-dimensional oxide, honeycomb crystal structure

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