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Šimko F, Rakhmatullin A, King G, Allix M, Bessada C, Netriová Z, Krishnan D, Korenko M. Cesium Oxo-fluoro-aluminates in the CsF-Al 2O 3 System: Synthesis and Structural Characterization. Inorg Chem 2023; 62:15651-15663. [PMID: 37698893 DOI: 10.1021/acs.inorgchem.3c02386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/13/2023]
Abstract
In an experiment combining various approaches, a precise examination of a portion of the phase diagram of a CsF-Al2O3 system was carried out up to 40 mol% Al2O3. CsF-Al2O3 solidified mixtures have been investigated using high-field solid-state NMR (133Cs, 27Al, and 19F) spectroscopy and X-ray powder diffraction over a broad range of compositions with synchrotron powder diffraction and Rietveld analysis. A new cesium oxo-fluoro-aluminate, Cs2Al2O3F2, was discovered, prepared, and structurally analyzed by synchrotron diffraction analysis. In addition to Cs2Al2O3F2, we have synthesized the following pure compounds in order to aid in the interpretation of NMR spectra of the solidified samples: CsAlF4, Cs3AlF6, and CsAlO2.
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Affiliation(s)
- František Šimko
- Institute of Inorganic Chemistry, Slovak Academy of Sciences, 845 36 Bratislava, Slovakia
- Centre of Excellence for Advanced Materials Application - CEMEA, Slovak Academy of Sciences, Dúbravská cesta 5807/9, 845 11 Bratislava, Slovakia
| | - Aydar Rakhmatullin
- Conditions Extrêmes ét Matériaux: Haute Température et Irradiation, CEMHTI, UPR 3079 -CNRS Univ. Orléans 450 71, Orléans, France
| | - Graham King
- Material and Chemical Sciences, Canadian Light Source, Saskatoon, Saskatchewan S7N 2V3, Canada
| | - Mathieu Allix
- Conditions Extrêmes ét Matériaux: Haute Température et Irradiation, CEMHTI, UPR 3079 -CNRS Univ. Orléans 450 71, Orléans, France
| | - Catherine Bessada
- Conditions Extrêmes ét Matériaux: Haute Température et Irradiation, CEMHTI, UPR 3079 -CNRS Univ. Orléans 450 71, Orléans, France
| | - Zuzana Netriová
- Institute of Inorganic Chemistry, Slovak Academy of Sciences, 845 36 Bratislava, Slovakia
| | - Dhiya Krishnan
- Institute of Inorganic Chemistry, Slovak Academy of Sciences, 845 36 Bratislava, Slovakia
| | - Michal Korenko
- Institute of Inorganic Chemistry, Slovak Academy of Sciences, 845 36 Bratislava, Slovakia
- Material and Chemical Sciences, Canadian Light Source, Saskatoon, Saskatchewan S7N 2V3, Canada
- Loire Valley Institute for Advanced Studies, 1 Rue Dupanloup, 45000 Orléans, France
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Chen P, Murshed MM, Fischer M, Frederichs T, Gesing TM. KLi 2RE(BO 3) 2 (RE = Dy, Ho, Er, Tm, Yb, and Y): Structural, Spectroscopic, And Thermogravimetric Studies on a Series of Mixed-Alkali Rare-Earth Orthoborates. Inorg Chem 2020; 59:18214-18224. [PMID: 33305583 DOI: 10.1021/acs.inorgchem.0c02684] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report a detailed structural, spectroscopic, and thermogravimetric investigation of a new series of mixed-alkali rare-earth orthoborates KLi2RE(BO3)2 (RE = Dy, Ho, Er, Tm, Yb, and Y). Single crystals were directly prepared by a flux method as well as mechanically separated from the polycrystalline powder obtained from the conventional solid-state reactions. All KLi2RE(BO3)2 members are isotypic and crystallize in the space group P21/n. The novel structure type is comprised of [RE2(BO3)4O4]14- anionic clusters where the edge-sharing REO7 pentagonal bipyramids are connected by BO3 groups and both K+ and Li+ cations are located at the interstitial voids of the 3D network. The metric parameters and crystal structural features obtained from the single-crystal data are in excellent agreement with those refined from the powder data. The change of the lattice parameters and unit cell volumes can be explained in terms of the lanthanide contraction effect. A comparison between KLi2RE(BO3)2 and other rare-earth borates with similar chemical compositions indicates that the sum of the ionic radii of the alkali-metal cations governs the symmetry of the crystals. Diffuse reflectance UV-vis spectra display the characteristic absorption behaviors of the RE3+ cations and the fundamental absorption edge. Both the Tauc's and derivation of absorption spectrum fitting (DASF) methods were used to identify the magnitude and type of bandgap, respectively, which are compared with those obtained from density functional theory (DFT) calculations. The calculated phonon density of states and the vibrational frequency at the gamma point help explain the Fourier transform infrared and Raman spectra of KLi2RE(BO3)2. The incongruent melting behavior and the thermal stability of each member of the KLi2RE(BO3)2 series were also studied by thermogravimetric analyses.
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Affiliation(s)
- Pengyun Chen
- Institute of Inorganic Chemistry and Crystallography, Faculty of Biology and Chemistry, University of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
| | - M Mangir Murshed
- Institute of Inorganic Chemistry and Crystallography, Faculty of Biology and Chemistry, University of Bremen, Leobener Straße 7, D-28359 Bremen, Germany.,MAPEX Center for Materials and Processes, University of Bremen, Bibliothekstraße 1, D-28359 Bremen, Germany
| | - Michael Fischer
- Crystallography, Faculty of Geosciences, University of Bremen, Klagenfurter Straße 2-4, D-28359 Bremen, Germany.,MAPEX Center for Materials and Processes, University of Bremen, Bibliothekstraße 1, D-28359 Bremen, Germany
| | - Thomas Frederichs
- Faculty of Geosciences, University of Bremen, Klagenfurter Straße 2-4, D-28359 Bremen, Germany
| | - Thorsten M Gesing
- Institute of Inorganic Chemistry and Crystallography, Faculty of Biology and Chemistry, University of Bremen, Leobener Straße 7, D-28359 Bremen, Germany.,MAPEX Center for Materials and Processes, University of Bremen, Bibliothekstraße 1, D-28359 Bremen, Germany
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Šimko F, Rakhmatullin A, Véron E, Allix M, Florian P, Kontrík M, Netriová Z, Korenko M, Kavečanský V, Bessada C. Oxo- and Oxofluoroaluminates in the RbF-Al 2O 3 System: Synthesis and Structural Characterization. Inorg Chem 2018; 57:13702-13712. [PMID: 30353736 DOI: 10.1021/acs.inorgchem.8b02275] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Precise research on the RbF-Al2O3 system was carried out by means of combining X-ray powder diffraction, high-field solid-state NMR spectroscopy, and thermal analysis methods. α-Rb3AlF6, RbAlO2, Rb2Al22O34, and new phase, Rb2Al2O3F2, were identified in the system. The structure of this new rubidium oxofluoroaluminate was determined. It is built up from single layers of oxygen-connected AlO3F tetrahedra, those layers beeing separated by fluorine atoms. This type of structure exhibits a decent ionic conductivity at ambient temperature, 1.74 × 10-6 S cm-1. The similar structural arrangement of O3Al-O-AlO3 and FO2Al-O-AlO2F tetrahedra of the conduction planes in Rb2Al22O34 and Rb2Al2O3F2 were confirmed by 27Al NMR measurements. A thermal analysis of the RbF-Al2O3 system revealed that it can be defined as a pseudobinary subsystem of the more general quaternary RbF-AlF3-Al2O3-Rb2O phase diagram. From a phase analysis of individual phase fields, the mutual metastable behavior of all founded phases can be considered. It was observed that fluoro- and oxoaluminates exist together. Rb2Al2O3F2 is more stable under high temperature. Rubidium fluoro- and oxoaluminates are metastable precursors of the thermodynamically more stable structure of rubidium oxofluoroaluminate.
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Affiliation(s)
- František Šimko
- Institute of Inorganic Chemistry , Slovak Academy of Sciences , 845 36 Bratislava , Slovakia
| | - Aydar Rakhmatullin
- Conditions Extrêmes ét Matériaux: Haute Température et Irradiation, CEMHTI , UPR 3079-CNRS Univ. Orléans , 450 71 , Orléans , France
| | - Emmanuel Véron
- Conditions Extrêmes ét Matériaux: Haute Température et Irradiation, CEMHTI , UPR 3079-CNRS Univ. Orléans , 450 71 , Orléans , France
| | - Mathieu Allix
- Conditions Extrêmes ét Matériaux: Haute Température et Irradiation, CEMHTI , UPR 3079-CNRS Univ. Orléans , 450 71 , Orléans , France
| | - Pierre Florian
- Conditions Extrêmes ét Matériaux: Haute Température et Irradiation, CEMHTI , UPR 3079-CNRS Univ. Orléans , 450 71 , Orléans , France
| | - Martin Kontrík
- Institute of Inorganic Chemistry , Slovak Academy of Sciences , 845 36 Bratislava , Slovakia
| | - Zuzana Netriová
- Institute of Inorganic Chemistry , Slovak Academy of Sciences , 845 36 Bratislava , Slovakia
| | - Michal Korenko
- Institute of Inorganic Chemistry , Slovak Academy of Sciences , 845 36 Bratislava , Slovakia
| | - Viktor Kavečanský
- Institute of Experimental Physics SAS , Watsonova 47 , 040 01 Košice , Slovakia
| | - Catherine Bessada
- Conditions Extrêmes ét Matériaux: Haute Température et Irradiation, CEMHTI , UPR 3079-CNRS Univ. Orléans , 450 71 , Orléans , France
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Kim DG, Moosavi-Khoonsari E, Jung IH. Thermodynamic modeling of the K2O-Al2O3 and K2O-MgO-Al2O3 systems with emphasis on β- and βʹʹ-aluminas. Ann Ital Chir 2018. [DOI: 10.1016/j.jeurceramsoc.2018.02.030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Affiliation(s)
- Cordula Braun
- Department Chemie Lehrstuhl für Anorganische Festkörperchemie Ludwig‐Maximilians‐Universität München Butenandtstraße 5‐13 (D) München Germany
- Karlsruhe Institut of Technology (KIT) Institut for Applied Materials‐Energy Storage Systems (IAM‐ESS) Herrmann‐von‐Helmholtz‐Platz 1 76344 Eggenstein‐Leopoldshafen Germany
- Technische Universität Darmstadt Fachbereich Material‐ und Geowissenschaften, FG Strukturforschung Alarich‐Weiss‐Strasse 2 64287 Darmstadt Germany
| | - Helmut Ehrenberg
- Karlsruhe Institut of Technology (KIT) Institut for Applied Materials‐Energy Storage Systems (IAM‐ESS) Herrmann‐von‐Helmholtz‐Platz 1 76344 Eggenstein‐Leopoldshafen Germany
| | - Wolfgang Schnick
- Department Chemie Lehrstuhl für Anorganische Festkörperchemie Ludwig‐Maximilians‐Universität München Butenandtstraße 5‐13 (D) München Germany
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Šimko F, Rakhmatullin A, Florian P, Kontrík M, Korenko M, Netriová Z, Danielik V, Bessada C. (Oxo)(Fluoro)-Aluminates in KF-Al 2O 3 System: Thermal Stability and Structural Correlation. Inorg Chem 2017; 56:13349-13359. [PMID: 29064237 DOI: 10.1021/acs.inorgchem.7b02105] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Precise investigation of part of the phase diagram of KF-Al2O3 system was performed in an experiment combining different techniques. Solidified mixtures of KF-Al2O3 were studied by X-ray powder diffraction and high-field solid-state NMR spectroscopy over a wide range of compositions. To help with the interpretation of the NMR spectra of the solidified samples found as complex admixtures, we synthesized the following pure compounds: KAlO2, K2Al22O34, α-K3AlF6, KAlF4, and K2Al2O3F2. These compounds were then characterized using various solid-state NMR techniques, including MQ-MAS and D-HMQC. NMR parameters of the pure compounds were finally determined using first-principles density functional theory calculations. The phase diagram of KF-Al2O3 with the alumina content up to 30 mol % was determined by means of thermal analysis. Thermal analysis was also used for the description of the thermal stability of one synthesized compound, K2Al2O3F2.
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Affiliation(s)
- František Šimko
- Institute of Inorganic Chemistry, Slovak Academy of Sciences , 845 36 Bratislava, Slovakia
| | - Aydar Rakhmatullin
- Conditions Extrêmes ét Materiaux: Haute Température et Irradiation, UPR 3079-CNRS Univ. Orléans 450 71, Orléans, France
| | - Pierre Florian
- Conditions Extrêmes ét Materiaux: Haute Température et Irradiation, UPR 3079-CNRS Univ. Orléans 450 71, Orléans, France
| | - Martin Kontrík
- Institute of Inorganic Chemistry, Slovak Academy of Sciences , 845 36 Bratislava, Slovakia
| | - Michal Korenko
- Institute of Inorganic Chemistry, Slovak Academy of Sciences , 845 36 Bratislava, Slovakia
| | - Zuzana Netriová
- Institute of Inorganic Chemistry, Slovak Academy of Sciences , 845 36 Bratislava, Slovakia
| | - Vladimír Danielik
- Faculty of Chemical and Food Technology, Slovak University of Technology , Radlinského 9, 812 37 Bratislava, Slovakia
| | - Catherine Bessada
- Conditions Extrêmes ét Materiaux: Haute Température et Irradiation, UPR 3079-CNRS Univ. Orléans 450 71, Orléans, France
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Catalytic hydrogenation of 2-nitro-2′-hydroxy-5′-methylazobenzene over solid base-hydrogenation bifunctional catalysts: Effect of alkali metals on Pd/γ-Al2O3. CATAL COMMUN 2017. [DOI: 10.1016/j.catcom.2016.11.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Wang B, Si L, Yuan Y, Li Y, Chen L, Yan X. Reductive cyclization of 2-nitro-2′-hydroxy-5′-methylazobenzene to benzotriazole over K-doped Pd/γ-Al2O3. RSC Adv 2016. [DOI: 10.1039/c5ra26800a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of Pd/γ-Al2O3 catalysts modified by potassium salts were prepared and evaluated in the reductive cyclization of 2-nitro-2′-hydroxy-5′-methylazobenzene without additional base.
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Affiliation(s)
- Bowei Wang
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
| | - Leilei Si
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Yanyan Yuan
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- P. R. China
| | - Yang Li
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
| | - Ligong Chen
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
| | - Xilong Yan
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072
- P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
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Shekhtman GS, Burmakin EI. Solid electrolytes based on rubidium monoaluminate doped with four-charged cations. RUSS J ELECTROCHEM+ 2015. [DOI: 10.1134/s1023193515050122] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Voronin VI, Shekhtman GS, Blatov VA. The natural tiling approach to cation conductivity in KAlO2 polymorphs. ACTA CRYSTALLOGRAPHICA SECTION B: STRUCTURAL SCIENCE 2012; 68:356-63. [DOI: 10.1107/s0108768112027462] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2012] [Accepted: 06/17/2012] [Indexed: 11/10/2022]
Abstract
A detailed analysis of correlations between structural features and cation conductivity is performed for KAlO2 polymorphs in a wide temperature range of 300–1023 K. To explore the migration maps of K+ cations we have used neutron diffraction data for low- and high-temperature KAlO2 polymorphs and applied for the first time a novel algorithm based on the natural tiling concept and implemented it into the program package TOPOS. Five independent elementary channels for the K+ cation migration have been revealed whose cross-sections were found to be essentially different in the low-temperature form, indicating a high anisotropy of the cation conductivity. During the transition to the cubic high-temperature phase all five channels become equivalent with sharply increased cross-sections that account for the jump-like increase of the cation conductivity and gives rise to its three-dimensional character.
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Ali NZ, Nuss J, Sheptyakov D, Jansen M. The AFeO2 (A=K, Rb and Cs) family: A comparative study of structures and structural phase transitions. J SOLID STATE CHEM 2010. [DOI: 10.1016/j.jssc.2010.01.022] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Gozel G, Thompson JG, Melnitchenko A. New phases in the Na 3PO 4-Mg 3(PO 4) 2 binary quenched from 1000 °C. Z KRIST-CRYST MATER 2001. [DOI: 10.1524/zkri.216.1.26.18995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
A reinvestigation of the Na3PO4-Mg3(PO4)2 binary at 1000 °C has identified two new ternary oxide phases and confirmed the existence of an orthorhombic solid solution phase in the vicinity of NaMg4(PO4)3. Cubic γ-Na3PO4 shows a solid solution up to ~20 mol. % Mg3(PO4)2. Between ~24 and ~29 mol. % a new γ-Na3PO4-related rhombohedral superstructure phase is observed. At ~44 mol. % Mg3(PO4)2 a new phase with a cristobalite-related structure is observed, which on cooling rapidly to room-temperature transforms to KGaO2-type (Pbca:
a = 10.409(2) Å, b = 14.492(2) Å, c = 5.211(1) Å). The NaMg4(PO4)3 solid-solution phase extends between ~72 and 80 mol. % Mg3(PO4)2. Surprisingly, and contrary to previous investigations, there is no phase at 50 mol. %, i.e. with stoichiometry NaMgPO4. All high-temperature annealing was performed in sealed Pt tubes to prevent loss of components to the atmosphere, which is suspected as the reason for the quite different results reported by some previous workers.
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