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Hao Y, Langer EM, Xiao B, Kegler P, Cao X, Hu K, Eichel RA, Wang S, Alekseev EV. Understanding of the structural chemistry in the uranium oxo-tellurium system under HT/HP conditions. Front Chem 2023; 11:1152113. [PMID: 36970412 PMCID: PMC10037309 DOI: 10.3389/fchem.2023.1152113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 02/22/2023] [Indexed: 03/12/2023] Open
Abstract
The study of phase formation in the U-Te-O systems with mono and divalent cations under high-temperature high-pressure (HT/HP) conditions has resulted in four new inorganic compounds: K2 [(UO2) (Te2O7)], Mg [(UO2) (TeO3)2], Sr [(UO2) (TeO3)2] and Sr [(UO2) (TeO5)]. Tellurium occurs as TeIV, TeV, and TeVI in these phases which demonstrate the high chemical flexibility of the system. Uranium VI) adopts a variety of coordinations, namely, UO6 in K2 [(UO2) (Te2O7), UO7 in Mg [(UO2) (TeO3)2] and Sr [(UO2) (TeO3)2], and UO8 in Sr [(UO2) (TeO5)]. The structure of K2 [(UO2) (Te2O7)] is featured with one dimensional (1D) [Te2O7]4- chains along the c-axis. The Te2O7 chains are further linked by UO6 polyhedra, forming the 3D [(UO2) (Te2O7)]2- anionic frameworks. In Mg [(UO2) (TeO3)2], TeO4 disphenoids share common corners with each other resulting in infinite 1D chains of [(TeO3)2]4- propagating along the a-axis. These chains link the uranyl bipyramids by edge sharing along two edges of the disphenoids, resulting in the 2D layered structure of [(UO2) (Te2O6)]2-. The structure of Sr [(UO2) (TeO3)2] is based on 1D chains of [(UO2) (TeO3)2]∞2− propagating into the c-axis. These chains are formed by edge-sharing uranyl bipyramids which are additionally fused together by two TeO4 disphenoids, which also share two edges. The 3D framework structure of Sr [(UO2) (TeO5)] is composed of 1D [TeO5]4− chains sharing edges with UO7 bipyramids. Three tunnels based on 6-Membered rings (MRs) are propagating along [001] [010] and [100] directions. The HT/HP synthetic conditions for the preparation of single crystalline samples and their structural aspects are discussed in this work.
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Affiliation(s)
- Yucheng Hao
- School of Energy Materials and Chemical Engineering, Hefei University, Hefei, China
| | - Eike M. Langer
- Institute of Energy and Climate Research (IEK-6), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Bin Xiao
- Institute of Energy and Climate Research (IEK-6), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Philip Kegler
- Institute of Energy and Climate Research (IEK-6), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Xin Cao
- School of Energy Materials and Chemical Engineering, Hefei University, Hefei, China
| | - Kunhong Hu
- School of Energy Materials and Chemical Engineering, Hefei University, Hefei, China
| | - Rüdiger-A. Eichel
- Institute of Energy and Climate Research (IEK-9), Forschungszentrum Jülich GmbH, Jülich, Germany
- Institut für Materialien und Prozesse für Elektrochemische Energiespeicher-und Wandler, RWTH Aachen University, Aachen, Germany
| | - Shuao Wang
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, China
| | - Evgeny V. Alekseev
- Institute of Energy and Climate Research (IEK-9), Forschungszentrum Jülich GmbH, Jülich, Germany
- *Correspondence: Evgeny V. Alekseev,
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U(VI) Coordination Modes in Complex Uranium Silicates: Cs[(UO6)2(UO2)9(Si2O7)F] and Rb2[(PtO4)(UO2)5(Si2O7)]. CHEMISTRY 2022. [DOI: 10.3390/chemistry4040100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Crystals of two new inorganic uranyl silicates, Cs[(UO6)2(UO2)9(Si2O7)F] (1) and Rb2[(PtO4)(UO2)5(Si2O7)] (2), were produced from melts in evacuated silica tubes. Their structures have been solved by direct methods: 1 is trigonal, P-31c, a = 10.2040(3), c = 17.1278(5) Å, V = 1544.45(10) Å3, R1 = 0.042; 2 is tetragonal, P4/mbm, a = 16.0400(24), c = 3.9231(6) Å, V = 1009.34(10) Å3, R1 = 0.045. 1 is the first example of cation–cation interactions between the uranyl polyhedra in uranyl silicates. Therein, UVI adopts three coordination modes, UO6 octahedra, UO6F, and UO7 pentagonal bipyramids, with the latter sharing common edges to form U2O12 dimers. Three dimers associate into six-membered rings via cation–cation interactions. The structure of 1 can be described as a complex uranyl fluoride silicate framework with channels filled by the U1 atoms and disordered Cs+ cations. 2 represents a new type of topology never observed before among the structures of uranyl compounds; it is also a first complex uranium platinum oxide. Therein, the UO6 tetragonal bipyramids share edges to form chains. Five such chains are stitched into a complex ribbon via the silicon polyhedra. The ribbons are connected into a framework by the PtO4 squares; rubidium atoms are located in the channels of the framework.
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Hao Y, Murphy GL, Kegler P, Li Y, Kowalski PM, Blouin S, Zhang Y, Wang S, Robben L, Gesing TM, Alekseev EV. Understanding the role of flux, pressure and temperature on polymorphism in ThB 2O 5. Dalton Trans 2022; 51:13376-13385. [PMID: 35984644 DOI: 10.1039/d2dt01049f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel polymorph of ThB2O5, denoted as β-ThB2O5, was synthesised under high-temperature high-pressure (HT/HP) conditions. Via single crystal X-ray diffraction measurements, β-ThB2O5 was found to form a three-dimensional (3D) framework structure where thorium atoms are ten-fold oxygen coordinated forming tetra-capped trigonal prisms. The only other known polymorph of ThB2O5, denoted α, synthesised herein using a known borax, B2O3-Na2B4O7, high temperature solid method, was found to transform to the β polymorph when exposed to conditions of 4 GPa and ∼900 °C. Compared to the α polymorph, β-ThB2O5 has smaller molar volume by approximately 12%. Exposing a mixture of the α and β polymorphs to HT/HP conditions ex situ further demonstrated the preferred higher-pressure phase being β, with no α phase material being observed via Rietveld refinements against laboratory X-ray powder diffraction (PXRD) measurements. In situ heating PXRD measurements on α-ThB2O5 from RT to 1030 °C indicated that α-ThB2O5 transforms to the β variant at approximately 900 °C via a 1st order mechanism. β-ThB2O5 was found to exist only over a narrow temperature range, decomposing above 1050 °C. Ab initio calculations using density functional theory (DFT) with the Hubbard U parameter indicated, consistent with experimental observations, that β is both the preferred phase at higher temperatures and high pressures. Interestingly, it was found by switching from B2O3-Na2B4O7 to H3BO3-Li2CO3 flux using consistent high temperature solid state conditions for the synthesis of the α variant, β-ThB2O5 could be generated. Comparison of their single crystal measurements showed this was identical to that obtained from HT/HP conditions.
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Affiliation(s)
- Yucheng Hao
- School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, China.
| | - Gabriel L Murphy
- Institute of Energy and Climate Research (IEK-6), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany.
| | - Philip Kegler
- Institute of Energy and Climate Research (IEK-6), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany.
| | - Yan Li
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen (Zhongshan) University, Guangzhou, 510275, PR China
| | - Piotr M Kowalski
- Institute of Energy and Climate Research (IEK-13), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany.,JARA Energy & Center for Simulation and Data Science (CSD), Jülich, Germany
| | - Simon Blouin
- Department de Physique, University of Montreal, Montreal, QC H3C 3J7, Canada.,Department of Physics and Astronomy, University of Victoria, Victoria, BC V8P 5C2, Canada
| | - Yang Zhang
- School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, China.
| | - Shuao Wang
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China
| | - Lars Robben
- University of Bremen, Institute of Inorganic Chemistry and Crystallography, D-28359 Bremen, Germany.,University of Bremen, MAPEX Center for Materials and Processes, D-28359 Bremen, Germany
| | - Thorsten M Gesing
- University of Bremen, Institute of Inorganic Chemistry and Crystallography, D-28359 Bremen, Germany.,University of Bremen, MAPEX Center for Materials and Processes, D-28359 Bremen, Germany
| | - Evgeny V Alekseev
- Institute of Energy and Climate Research (IEK-9), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany.
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Li X, Zhang Y, Pan Y, Hao Y, Lin Y, Li H, Li M, Fan C, Alekseev EV. Li 3[Al(PO 4) 2(H 2O) 1.5] and Na[AlP 2O 7]: from 2D layered polar to 3D centrosymmetric framework structures. CrystEngComm 2022. [DOI: 10.1039/d2ce00994c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two new aluminophosphates with moderate NLO property or a short UV cut-off edge (∼190 nm) are reported.
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Affiliation(s)
- Xinlei Li
- School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, China
| | - Yang Zhang
- School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, China
| | - Yang Pan
- School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, China
| | - Yucheng Hao
- School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, China
| | - Yuan Lin
- Strait Institute of Flexible Electronics (SIFE, Future Technologies), Fujian Normal University, Fuzhou 350117, Fujian, China
- Strait Laboratory of Flexible Electronics (SLoFE), Fuzhou 350117, Fujian, China
| | - Haijian Li
- National Key Lab of Science and Technology on Combustion and Explosion, Xi'an Modern Chemistry Research Institute, Xi'an, 710065, China
| | - Minghua Li
- School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, China
| | - Changzeng Fan
- State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
| | - Evgeny V. Alekseev
- Institute of Energy and Climate Research (IEK-9), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
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Hao Y, Kegler P, Albrecht‐Schmitt TE, Wang S, Dong Q, Alekseev EV. Two‐Dimensional Uranyl Borates: From Conventional to Extreme Synthetic Conditions. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.201901239] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yucheng Hao
- School of Energy Materials and Chemical Engineering Hefei University 230000 Hefei China
| | - Philip Kegler
- Institute of Energy and Climate Research (IEK‐6) Forschungszentrum Jülich GmbH 52428 Jülich Germany
| | - Thomas E. Albrecht‐Schmitt
- Department of Chemistry and Biochemistry Florida State University 95 Chieftan Way 32306‐4390 Tallahassee FL USA
| | - Shuao Wang
- School for Radiological and Interdisciplinary Sciences (RAD‐X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions 215123 Jiangsu China
| | - Qiang Dong
- School of Energy Materials and Chemical Engineering Hefei University 230000 Hefei China
| | - Evgeny V. Alekseev
- Institute of Energy and Climate Research (IEK‐6) Forschungszentrum Jülich GmbH 52428 Jülich Germany
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Hao Y, Pan Y, Lin Y, He L, Ge G, Ruan Y, Zhou H, Xue Y, Koirala K. Highly porous aluminophosphates with unique three dimensional open framework structures from mild hydrothermal syntheses. CrystEngComm 2020. [DOI: 10.1039/d0ce00075b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three novel highly porous aluminophosphates were synthesized through mild hydrothermal methods. Interestingly, among them, α-NaAlPO4(OH) is polar and exhibits moderate nonlinear optical properties with a short cutoff edge.
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Affiliation(s)
- Yucheng Hao
- School of Energy Materials and Chemical Engineering
- Hefei University
- Hefei 230000
- China
| | - Yang Pan
- School of Energy Materials and Chemical Engineering
- Hefei University
- Hefei 230000
- China
| | - Yuan Lin
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou 350002
- P. R. China
| | - Linbo He
- School of Energy Materials and Chemical Engineering
- Hefei University
- Hefei 230000
- China
| | - Guangjie Ge
- School of Energy Materials and Chemical Engineering
- Hefei University
- Hefei 230000
- China
| | - Yu Ruan
- School of Energy Materials and Chemical Engineering
- Hefei University
- Hefei 230000
- China
| | - Haida Zhou
- School of Energy Materials and Chemical Engineering
- Hefei University
- Hefei 230000
- China
| | - Yang Xue
- School of Energy Materials and Chemical Engineering
- Hefei University
- Hefei 230000
- China
| | - Kisan Koirala
- Department of Chemistry
- Prithvi Narayan Campus
- Tribhuvan University
- Pokhara
- Nepal
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