Nickel(II) uranium(IV) trisulfide

Ward,; Ibers, James A.

doi:10.1107/s1600536813033680

Cited by 6 publications

(6 citation statements)

References 9 publications

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“…One of them is CuTaS 3 , which has been shown to appear in a “needle‐like” phase with a structure different from the NH 4 CdCl 3 ‐type discussed above. [ 88–91 ] Finally, we note a series of GdFeO 3 ‐type compounds containing uranium, [ 106 ] including URuS 3 , [ 98 ] URhS 3 , [ 98 ] UNiS 3 , [ 97 ] UVS 3 , [ 96 ] UCrS 3 , [ 96 ] and BaUS 3 . [ 23 ] Obviously, these compounds have little practical relevance for PV, and hence are disregarded.…”

Section: The Discovered Chalcogenide Perovskitesmentioning

confidence: 99%

Chalcogenide Perovskites: Tantalizing Prospects, Challenging Materials

Sopiha

Comparotto

Marquez

et al. 2021

Advanced Optical Materials

108

125

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Chalcogenide perovskites have recently emerged into the spotlight as highly robust, earth abundant, and nontoxic candidates for various energy conversion applications, not least photovoltaics (PV). Now, a serious effort is required to determine if they can emulate the PV performance of the better‐known, part‐organic halide perovskites, in applications such as tandem solar cells. This review summarizes the surprisingly large body of literature pertaining to chalcogenide perovskites, which have been investigated for many years despite only recently being considered for applications. The confusing variety of claims coming from computational materials discovery is clarified, and it is specified which chalcogenide perovskites actually exist and should form the focus of experimental work. The highly interesting optoelectronic and transport properties of the known materials at their current stage of development are summarized, which makes a clear case for investigating them further. The existing synthesis literature is collated, which provides some important and possibly unnoticed clues to experimentalists grappling with these somewhat challenging materials. The authors hope that the highlighting of this information will facilitate further exciting studies, better approaches, and new progress for chalcogenide perovskites.

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Section: The Discovered Chalcogenide Perovskitesmentioning

confidence: 99%

Chalcogenide Perovskites: Tantalizing Prospects, Challenging Materials

Sopiha

Comparotto

Marquez

et al. 2021

Advanced Optical Materials

108

125

View full text Add to dashboard Cite

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“…The flux growth of several U(V) oxides has been reported from Cs 2 SO 4 , H 3 BO 3 , and ACl (A = alkali metal) flux . The single-crystal synthesis of several U(IV) fluorides has also been reported using UF 4 and a LiCl–ZnCl 2 eutectic flux under argon in a monel alloy reactor. , Furthermore, the flux growth of many reduced uranium chalcogenides using a variety of fluxes including BaS, BaBr 2 /KBr, and CsCl, in sealed tubes, has been reported. − However, the flux synthesis of uranium(IV) oxides presents several further challenges. UO 2 is inert to many solvents, including alkali chloride fluxes such as the one used for the U(IV) fluoride syntheses.…”

Section: Introductionmentioning

confidence: 99%

Flux Synthesis, Structure, Properties, and Theoretical Magnetic Study of Uranium(IV)-Containing A₂USi₆O₁₅ (A = K, Rb) with an Intriguing Green-to-Purple, Crystal-to-Crystal Structural Transition in the K Analogue

et al. 2015

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The flux growth of uranium(IV) oxides presents several challenges, and to the best of our knowledge, only one example has ever been reported. We succeeded in growing two new reduced uranium silicates A2USi6O15 (A = K, Rb) under flux growth conditions in sealed copper tubes. The compounds crystallize in a new structure type with space group C2/c and lattice parameters a = 24.2554(8) Å, b = 7.0916(2) Å, c = 17.0588(6) Å, β = 97.0860(6) ° (K) and a = 24.3902(8) Å, b = 7.1650(2) Å, c = 17.2715(6) Å, β = 96.8600(6) ° (Rb). A2USi6O15 (A = K, Rb) are isocompositional to a previously reported Cs2USi6O15, and the two structures are compared. K2USi6O15 undergoes an interesting crystal-to-crystal structural phase transition at T ≈ 225 K to a triclinic structure, which is accompanied by an intense color change. The magnetic properties of A2USi6O15 (A = K, Rb, Cs) are reported and differ from the magnetism observed in other U(4+) compounds. Calculations are performed on the (UO6)(-8) clusters of K2USi6O15 to study the cause of these unique magnetic properties.

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“…These compositions are of interest for a number of reasons including a +4 cation on the A site, interesting magnetic properties, and past difficulty in preparing a phase-pure sample, (Figure ). To generate the target phases, we performed a series of two-step solid-state reactions. In the first step, the precursors U 3 O 8 , NiO, and CoC 2 O 4 ·2H 2 O were weighed out in the proper stoichiometric quantities, pelletized, and prereacted at 1100 °C in air.…”

Section: Resultsmentioning

confidence: 89%

Facile Oxide to Chalcogenide Conversion for Actinides Using the Boron–Chalcogen Mixture Method

2020

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Actinide chalcogenides are of interest for fundamental studies of the behavior of 5f electrons in actinides located in a soft ligand coordination environment. As actinides exhibit an extremely high affinity for oxygen, the synthesis of phase-pure actinide chalcogenide materials free of oxide impurities is a great challenge and, moreover, requires the availability and use of oxygen-free starting materials. Herein, we report a new method, the boron–chalcogen mixture (BCM) method, for the synthesis of phase-pure uranium chalcogenides based on the use of a boron–chalcogen mixture, where boron functions as an “oxygen sponge” to remove oxygen from an oxide precursor and where the elemental chalcogen effects transformation of the oxide precursor into an oxygen-free chalcogenide reagent. The boron oxide can be separated from the reaction mixture that is left to react to form the desired chalcogenide product. Several syntheses are presented that demonstrate the broad functionality of the technique, and thermodynamic calculations that show the underlying driving force are discussed. Specifically, three classes of chalcogenides that include both new (rare earth uranium sulfides and alkali–thorium thiophosphates) and previously reported compounds were prepared to validate the approach: binary uranium and thorium sulfides, oxide to sulfide transformation in solid-state reactions, and in situ generation of actinide chalcogenides in flux crystal growth reactions.

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Nickel(II) uranium(IV) trisulfide

Cited by 6 publications

References 9 publications

Chalcogenide Perovskites: Tantalizing Prospects, Challenging Materials

Chalcogenide Perovskites: Tantalizing Prospects, Challenging Materials

Flux Synthesis, Structure, Properties, and Theoretical Magnetic Study of Uranium(IV)-Containing A₂USi₆O₁₅ (A = K, Rb) with an Intriguing Green-to-Purple, Crystal-to-Crystal Structural Transition in the K Analogue

Facile Oxide to Chalcogenide Conversion for Actinides Using the Boron–Chalcogen Mixture Method

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Nickel(II) uranium(IV) trisulfide

Cited by 6 publications

References 9 publications

Chalcogenide Perovskites: Tantalizing Prospects, Challenging Materials

Chalcogenide Perovskites: Tantalizing Prospects, Challenging Materials

Flux Synthesis, Structure, Properties, and Theoretical Magnetic Study of Uranium(IV)-Containing A2USi6O15 (A = K, Rb) with an Intriguing Green-to-Purple, Crystal-to-Crystal Structural Transition in the K Analogue

Facile Oxide to Chalcogenide Conversion for Actinides Using the Boron–Chalcogen Mixture Method

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Product

Resources

About

Flux Synthesis, Structure, Properties, and Theoretical Magnetic Study of Uranium(IV)-Containing A₂USi₆O₁₅ (A = K, Rb) with an Intriguing Green-to-Purple, Crystal-to-Crystal Structural Transition in the K Analogue