Synthesis, Characterization, and Magnetic Properties of Uranium-Containing 2H-Perovskite-Related Sulfides: Ba3MUS6 (M = Mn, Fe, Co, Ni) and Ba3Co0.858(5)Mg0.142(5)US6

Logan S Breton; Gregory Morrison; Hans-Conrad Zur Loye

doi:10.1021/acs.inorgchem.3c02749

Synthesis, Characterization, and Magnetic Properties of Uranium-Containing 2H-Perovskite-Related Sulfides: Ba₃MUS₆ (M = Mn, Fe, Co, Ni) and Ba₃Co_0.858(5)Mg_0.142(5)US₆

Inorg Chem. 2023 Oct 23;62(42):17409-17416. doi: 10.1021/acs.inorgchem.3c02749. Epub 2023 Oct 9.

Authors

Logan S Breton¹, Gregory Morrison¹, Hans-Conrad Zur Loye¹

Affiliation

¹ Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States.

PMID: 37812138
DOI: 10.1021/acs.inorgchem.3c02749

Abstract

The uranium-containing 2H-perovskite-related chalcogenide family of compounds was revisited using the recently developed boron-chalcogen mixture (BCM) method for actinides to aid in their syntheses and to obtain magnetic measurements. Two known 2H-perovskite-related structures, Ba₃MnUS₆ and Ba₃FeUS₆, were synthesized using the BCM method and were found to exhibit antiferromagnetic transitions at T_N = ∼7.6 and 10.8 K, respectively. Combining the BCM method with the molten flux crystal growth technique resulted in single crystals of three new compositions, Ba₃NiUS₆, Ba₃CoUS₆, and Ba₃Co_0.858(5)Mg_0.142(5)US₆, the synthesis and characterization of which is reported. Magnetic measurements of Ba₃NiUS₆ revealed a complex magnetic susceptibility consisting of a weak, glassy, antiferromagnetic transition near 65 K followed by an antiferromagnetic transition at T_N = ∼18 K. A reduced radius ratio plot for the existing chalcogenide compositions and new additions to this structure type reported herein is presented to aid in the search for additional 2H-perovskite-related sulfides.