Variable Structures and One-Dimensional-Canting Antiferromagetism Found in Fluoride Selenates, A2Mn(SeO4)F3 (A = K, Rb, Cs)

Tianyu Zhu; Suheon Lee; Xinan Zhang; Haoming Yang; Yong Jin; Yanling Jin; Kwang-Yong Choi; Minfeng Lü

doi:10.1021/acs.inorgchem.1c02084

Variable Structures and One-Dimensional-Canting Antiferromagetism Found in Fluoride Selenates, A₂Mn(SeO₄)F₃ (A = K, Rb, Cs)

Inorg Chem. 2021 Sep 6;60(17):13707-13717. doi: 10.1021/acs.inorgchem.1c02084. Epub 2021 Aug 12.

Authors

Tianyu Zhu¹, Suheon Lee², Xinan Zhang¹, Haoming Yang¹, Yong Jin¹, Yanling Jin¹, Kwang-Yong Choi², Minfeng Lü¹

Affiliations

¹ School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, Jiangsu, China.
² Department of Physics, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea.

PMID: 34380318
DOI: 10.1021/acs.inorgchem.1c02084

Abstract

Three new alkali-metal manganese fluoride selenates, A₂Mn(SeO₄)F₃ (A = K, Rb, Cs), were prepared through hydrothermal redox reactions. The products consisted of one-dimensional polymeric anionic _∞[Mn(SeO₄)F₃]^2- chains, where the A⁺ cations are connected by O and/or F atoms to form blocks with two-dimensional layers. A₂Mn(SeO₄)F₃ (A= Rb, Cs) is isostructural with the monoclinic space group P2₁/c, while K₂Mn(SeO₄)F₃ crystallizes in the orthorhombic space group Pbcn. A₂Mn(SeO₄)F₃ (A = K, Rb, Cs) forms spin chains of Mn³⁺ with different Mn-F-Mn bridges, which showed canting antiferromagnetic behaviors. Single-crystal magnetic measurements revealed that the magnetic moments of the Mn ions were more canted for larger alkali-metal compounds in an antiferromagnetically ordered state.