Sensitivity of Mild Hydrothermal Synthesis to the Reaction Conditions: Targeting Mixed-Metal Hexagonal Tungsten Bronze Fluorides Ax M2+xM3+(1-x)F3 to Investigate Their Magnetic Behavior

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Article

Abstract

The synthesis of five quaternary hexagonal tungsten bronze (HTB) fluorides, AxM2+xM3+(1-x)F3, (A = Cs and Rb; M2+ = Co2+, Ni2+, and Zn2+; and M3+ = V3+) via a mild hydrothermal route is reported. The crystal structures and compositions were determined using a combination of single-crystal X-ray diffraction, Rietveld refinement of powder X-ray diffraction data, and inductively coupled plasma optical emission spectroscopy analysis. This study highlights the sensitivity of the mild hydrothermal method on the reaction temperature, solvent system, and quantity of starting reagents that directly influence the selective synthesis of kinetically stabilized fluoride materials, including hydrated fluorides, β-pyrochlores, and HTB. The magnetic susceptibility and isothermal magnetization data for all five compounds were collected, which revealed the existence of a strong antiferromagnetic component in these phases. The presence of the Kagome layer in the structure results in geometrical frustration and leads to frustration indexes ranging from 7 to 13 for these compounds.

Digital Object Identifier (DOI)

https://doi.org/10.1021/acs.inorgchem.4c02307

Rights

© 2024 American Chemical Society

APA Citation

Keerthisinghe, Berseneva, Breton, & Schorne-Pinto (2024). Sensitivity of Mild Hydrothermal Synthesis to the Reaction Conditions: Targeting Mixed-Metal Hexagonal Tungsten Bronze Fluorides Axm2+Xm3+(1-X)F3 to Investigate Their Magnetic Behavior. Inorganic Chemistry, 63(38), 17598–17607. https://doi.org/10.1021/acs.inorgchem.4c02307

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