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Klepov VV, Kocevski V, Besmann TM, zur Loye HC. Dimensional reduction upon calcium incorporation in Cs 0.3(Ca 0.3Ln 0.7)PS 4 and Cs 0.5(Ca 0.5Ln 0.5)PS 4. CrystEngComm 2021. [DOI: 10.1039/d0ce01524e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of Ca-containing lanthanide thiophosphates has been obtained and their structural evolution from 3D for LnPS4 and Cs0.3(Ln0.7Ca0.3)PS4 to 2D in Cs0.5(Ln0.5Ca0.5)PS4 was shown as a function of Ca content.
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Affiliation(s)
- Vladislav V. Klepov
- Department of Chemistry and Biochemistry
- University of South Carolina
- Columbia
- USA
| | - Vancho Kocevski
- MST-8
- Los Alamos National Laboratory
- Los Alamos
- USA
- Department of Mechanical Engineering
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Breton LS, Klepov VV, zur Loye HC. Facile Oxide to Chalcogenide Conversion for Actinides Using the Boron–Chalcogen Mixture Method. J Am Chem Soc 2020; 142:14365-14373. [DOI: 10.1021/jacs.0c06483] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Logan S. Breton
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Vladislav V. Klepov
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Hans-Conrad zur Loye
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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Klepov VV, Pace KA, Breton LS, Kocevski V, Besmann TM, Zur Loye HC. Nearly Identical but Not Isotypic: Influence of Lanthanide Contraction on Cs 2NaLn(PS 4) 2 (Ln = La-Nd, Sm, and Gd-Ho). Inorg Chem 2020; 59:1905-1916. [PMID: 31965796 DOI: 10.1021/acs.inorgchem.9b03200] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The effect of lanthanide contraction often results in topological and symmetry changes in compounds with the same compositions as a function of lanthanide cation size. Here we report on the first example of a lanthanide thiophosphate exhibiting a change in the lanthanide cation environment without any topological or symmetry change. A series of new lanthanide thiophosphates with mixed alkali cations were obtained via a flux crystal growth technique using a CsI flux. The obtained compounds Cs2NaLn(PS4)2 (Ln = La-Nd, Sm, and Gd-Ho) were grown as large single crystals (∼0.1-1 mm3) and characterized using single-crystal X-ray diffraction and magnetic susceptibility measurements. As we moved across the series, the structural studies revealed a change in the lanthanide coordination environment depending on the identity of the lanthanide. Although all compounds in the Cs2NaLn(PS4)2 series crystallize in the same space group and have the same Wyckoff atom positions, a slight change in size between Sm3+ and Gd3+ causes a subtle change in coordination number from 9 (for Ln = La-Sm) to 8 (for Ln = Gd-Ho), resulting in two distinct but virtually identical structure types. Ab initio calculations were performed, and the observed experimental trend was corroborated computationally. Magnetic measurements performed on the Cs2NaLn(PS4)2 (Ln = Ce, Pr, Nd, Gd, and Tb) compounds revealed paramagnetic behavior.
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Abstract
Two new uranium(IV) thiosilicates, Cs2Na4[U2(SiS4)2(Si2S8)] and Cs2.12Na3.88[U2(SiS4)2(Si2S7)], were obtained by flux crystal growth using SiS2 as a silicon source. The former compound contains a novel Si2S86- unit that features a terminal persulfide group. The magnetic susceptibility measurements performed on this compound revealed paramagnetic behavior with a moment of 3.49 μB per uranium atom as obtained from a Curie-Weiss law fit and showed no magnetic transition down to 2 K. The structures are based on closely related isomeric planar and 3D topologies that can be transformed into one another by a rotation of the structural units.
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Affiliation(s)
- Vladislav V Klepov
- Department of Chemistry and Biochemistry , University of South Carolina , Columbia , South Carolina 29208 , United States
| | - Mark D Smith
- Department of Chemistry and Biochemistry , University of South Carolina , Columbia , South Carolina 29208 , United States
| | - Hans-Conrad Zur Loye
- Department of Chemistry and Biochemistry , University of South Carolina , Columbia , South Carolina 29208 , United States
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Mesbah A, Prakash J, Lebègue S, Beard JC, Malliakas CD, Ibers JA. Ag 5U(PS 4) 3: A Transition-Metal Actinide Phosphochalcogenide. Inorg Chem 2019; 58:535-539. [PMID: 30525530 DOI: 10.1021/acs.inorgchem.8b02739] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The structure of Ag5U(PS4)3 is unique, as in the literature there are no other structures of the type MAnPQ (M = transition metal, An = actinide, Q = S, Se, or Te). The compound has been synthesized at 1123 K by standard solid-state methods, and its single-crystal X-ray structure has been determined at 100(2) K. Ag5U(PS4)3 crystallizes in a remarkable new structure type in space group P3221 of the trigonal system with three formula units in a hexagonal cell of dimensions a = b = 9.6635(2) Å, c = 17.1834(4) Å, and γ = 120°. In the structure, each U atom is coordinated to eight S atoms in a bicapped trigonal prismatic manner. Each P atom is tetrahedrally coordinated to four S atoms. Two of the three unique Ag atoms are connected to four S atoms in a distorted tetrahedral manner, whereas the third unique Ag atom forms an Ag2S6 species. The overall structure consists of U polyhedra connected to each other via PS4 tetrahedra through edge-sharing in a zigzag fashion along the c axis to form infinite layers. PS4 groups and the Ag atoms pack these layers. From density functional theory calculations, the total density of states of Ag5U(PS4)3 is asymmetric with respect to spin and has finite spin polarization in the crystal cell: the magnetic moments of two of the U atoms are parallel, whereas the magnetic moment of the third U atom is antiparallel.
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Affiliation(s)
- Adel Mesbah
- Department of Chemistry , Northwestern University , 2145 Sheridan Road , Evanston 60208-3113 , Illinois , United States.,ICSM, UMR 5257 CEA, CNRS, ENSCM, Université de Montpellier , Site de Marcoule-Bât. 426 , BP 17171, Bagnols-sur-Cèze 30207 , France
| | - Jai Prakash
- Department of Chemistry , Northwestern University , 2145 Sheridan Road , Evanston 60208-3113 , Illinois , United States.,Department of Chemistry , Indian Institute of Technology Hyderabad , Kandi, Sangareddy 502 285 , Telangana , India
| | - Sébastien Lebègue
- Laboratoire de Physique et Chimie Théoriques (LPCT, UMR CNRS 7019), Institut Jean Barriol, Université de Lorraine , BP 239, Boulevard des Aiguillettes , Vandoeuvre-lès-Nancy 54506 , France
| | - Jessica C Beard
- Department of Chemistry , Northwestern University , 2145 Sheridan Road , Evanston 60208-3113 , Illinois , United States
| | - Christos D Malliakas
- Department of Chemistry , Northwestern University , 2145 Sheridan Road , Evanston 60208-3113 , Illinois , United States
| | - James A Ibers
- Department of Chemistry , Northwestern University , 2145 Sheridan Road , Evanston 60208-3113 , Illinois , United States
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Mesbah A, Prakash J, Beard JC, Lebègue S, Ibers JA. Synthesis and Crystal Structure of Cs2
U2
(P2
Se9
)(Se2
)2. Z Anorg Allg Chem 2018. [DOI: 10.1002/zaac.201800263] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Adel Mesbah
- Department of Chemistry; Northwestern University; 2145 Sheridan Road 60208-3113 Evanston IL USA
- ICSM, CEA, CNRS, ENSCM; Université Montpellier; 30207 Bagnols sur Cèze France
| | - Jai Prakash
- Department of Chemistry; Northwestern University; 2145 Sheridan Road 60208-3113 Evanston IL USA
- Department of Chemistry; Indian Institute of Technology Hyderabad; 502 285 Kandi Sangareddy, Telangana India
| | - Jessica C. Beard
- Department of Chemistry; Northwestern University; 2145 Sheridan Road 60208-3113 Evanston IL USA
| | - Sébastien Lebègue
- Laboratoire de Physique et Chimie Théoriques (LPCT, UMR CNRS 7019); Institut Jean Barriol; Université de Lorraine; BP 239, Boulevard des Aiguillettes 54506 Vandoeuvre-lès-Nancy France
| | - James A. Ibers
- Department of Chemistry; Northwestern University; 2145 Sheridan Road 60208-3113 Evanston IL USA
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Klepov VV, zur Loye HC. Complex Topologies from Simple Building Blocks: Uranium(IV) Thiophosphates. Inorg Chem 2018; 57:11175-11183. [PMID: 30113829 DOI: 10.1021/acs.inorgchem.8b01733] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vladislav V. Klepov
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, 29208 South Carolina, United States
| | - Hans-Conrad zur Loye
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, 29208 South Carolina, United States
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Mesbah A, Prakash J, Beard JC, Lebègue S, Malliakas CD, Ibers JA. Syntheses, crystal structures, optical and theoretical studies of the actinide thiophosphates SrU(PS4)2, BaU(PS4)2, and SrTh(PS4)2. Inorg Chem 2015; 54:2970-5. [PMID: 25714855 DOI: 10.1021/acs.inorgchem.5b00071] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Three new actinide thiophosphates, SrU(PS4)2, BaU(PS4)2, and SrTh(PS4)2, have been synthesized by high-temperature solid-state methods, and their crystal structures were determined from single-crystal X-ray diffraction studies. These three isostructural compounds crystallize in a new structure type in space group D4h13-P42/mbc of the tetragonal system. Their structure features infinite one-dimensional chains of ∞1[An(PS4)2(2–)] anions (An = U or Th). Each An atom is coordinated by eight S atoms in a bicapped trigonal prism, and each P atom is tetrahedrally bonded to four S atoms. The compounds are readily charge balanced as Ak2+An4+(P5+(S2–)4)2. Optical studies on single crystals of SrU(PS4)2 and BaU(PS4)2 as well as ground single crystals of SrTh(PS4)2 revealed a direct band gap of 2.13(2) eV and an indirect band gap value of 1.99(2) eV for SrU(PS4)2 and a direct and indirect gap of about 2.28(2) eV for BaU(PS4)2. SrTh(PS4)2 has a relatively large band gap of 3.02(2) eV. DFT calculations for SrU(PS4)2 and BaU(PS4)2 using the HSE functional predict both compounds to be antiferromagnetic and have very similar electronic structures with band gaps of 2.7 eV. The band gap calculated for SrTh(PS4)2 is 3.2 eV.
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Affiliation(s)
- Adel Mesbah
- Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
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