Synthesis of uranium mixed anion compounds synthesized using the Boron-Chalcogen Mixture method: Ba6Co6U0·91S13·5O0.5 and Ba5·47K0·53Zn6US13·5O0.5

Advances in Chalcogenide Crystal Growth: Flux and Solution Syntheses, and Approaches for Postsynthetic Modifications

“…Moreover, density functional theory (DFT) calculations demonstrated negative enthalpies of plutonium oxide, PuO 2 , conversion to Pu Q n ( Q = S, Se, and Te; n = 1–3), which is an excellent indicator for experimental success. Furthermore, it has become clear that the BCM method can be used to control the oxygen level in reaction mixtures and, thus, promote the discovery of novel oxychalcogenide materials …”

“…Furthermore, it has become clear that the BCM method can be used to control the oxygen level in reaction mixtures and, thus, promote the discovery of novel oxychalcogenide materials. 88 Even though flux crystal growth is a well-known cornerstone for the successful synthesis of solid-state materials, the transformations occurring with flux and reagents still need to be fully understood; they are sensitive not only to temperature but also to reagents and flux composition and concentration. This lack of knowledge about solid-state reaction mechanisms affects synthesis predictability and the design of novel materials.…”

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

“…K 2 S was synthesized as described in the literature and stored in a nitrogen glove bag . Ba 2 CoUO 6 was synthesized as previously reported …”

“…Mesbah et al have discovered many 2H-perovskite related uranium sulfides and selenides and reported on their synthesis and characterization. The magnetic behavior of the reported compounds, however, could not be determined due to side products and UOQ (Q = S, Se) impurities that could not be separated from the reaction products, which complicates magnetic measurements. , Our group recently developed the boron–chalcogen mixture (BCM) method for actinides, and has used this method to obtain a multitude of actinide containing chalcogenides. − The success of this method prompted us to expand the method toward the system of 2H-perovskite-related uranium sulfides to resynthesize some known compounds, to explore their magnetic behaviors, as well as to synthesize new compositions to add to the limited number of existing compounds. Herein, we report on the synthesis and magnetic behavior of two known 2H-perovskite-related uranium chalcogenides with the formula Ba 3 MUS 6 (M = Mn, Fe), as well as on the synthesis and characterization of three new additions to the family, Ba 3 NiUS 6 , Ba 3 CoUS 6 , and Ba 3 Co 0.858(5) Mg 0.142(5) US 6 , including the magnetic behavior of Ba 3 NiUS 6 .…”

Boron Chalcogen Mixture Method-Assisted Alkali Halide Flux Crystal Growth of an Extensive Family of Quaternary Rare Earth Transition-Metal Thiosilicates: Investigation of Their Structures and Magnetic Properties

“…The search for new chalcogenide materials continues to be a popular endeavor as many exhibit desirable physical properties. , One class of chalcogenides, the chalcometallates, is known to exhibit many useful properties , and, therefore, chalcometallate materials have already been integrated into various applications as fast ion conductors, , radiation detectors, − nonlinear optical materials, − and novel magnetic materials. , Recently, we have reported on a series of thiosilicates, a class of chalcometallates, of chemical formula RE 3 Mg 0.5 SiS 7 , that can be readily synthesized by a combination of the boron chalcogen mixture (BCM) and molten flux methods. − In brief, the BCM method utilizes elemental boron as an oxygen getter that removes oxygen from the reagents and binds it in the form of B 2 O 3 . Upon oxygen removal, the reagent metals can react with the chalcogenide.…”