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Charkin DO, Kuznetsov AN. When Four Ones are Equal to Ten on the Interest Scale: ZrSiCuAs/LaOAgS Type Revisited (Review). RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023622050047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Plokhikh IV, Tsirlin AA, Heletta L, Klenner S, Charkin DO, Kuznetsov AN, Shevelkov AV, Pöttgen R, Pfitzner A. Synthesis, electronic structure and physical properties of two new layered compounds, EuFAgSe and EuFAg 1-δTe, featuring the active redox pair Eu 2+/Ag . Dalton Trans 2020; 49:7426-7435. [PMID: 32432284 DOI: 10.1039/d0dt01504k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Systematic studies of the ZrCuSiAs (also LaOAgS or 1111) structure type resulted in the synthesis of two new fluoride chalcogenides, EuFAgSe and EuFAg1-δTe, whereas their sulfide analog, EuFAgS, could not be obtained. Both new compounds are tetragonal, P4/nmm, with cell parameters a = 4.1542(1) Å, c = 9.2182(1) Å for the selenide and a = 4.3255(1) Å, c = 9.5486(1) Å for the telluride. Rietveld refinement reveals a significant silver deficiency in the telluride (δ = 0.05), while the selenide is nearly stoichiometric. Both compounds are semiconductors as shown by diffuse reflectance spectroscopy and confirmed by density-functional calculations of the band structure. Magnetism of both compounds is predominantly driven by Eu2+, as indicated by magnetic susceptibility measurements and corroborated by 151Eu Mössbauer spectroscopy. EuFAg1-δTe and EuFAgSe are paramagnetic down to 1.8 K.
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Affiliation(s)
| | - Alexander A Tsirlin
- Experimental Physics VI, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany
| | - Lukas Heletta
- Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany
| | - Steffen Klenner
- Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany
| | - Dmitri O Charkin
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Alexey N Kuznetsov
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia and N.S. Kurnakov Institute of General and Inorganic Chemistry, 119991 Moscow, Russia
| | - Andrei V Shevelkov
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Rainer Pöttgen
- Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany
| | - Arno Pfitzner
- Univeristy of Regensburg, 93053 Regensburg, Germany.
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The Role of Delocalized Chemical Bonding in Square-Net-Based Topological Semimetals. J Am Chem Soc 2020; 142:6350-6359. [DOI: 10.1021/jacs.0c01227] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Plokhikh IV, Kuznetsov AN, Charkin DO, Shevelkov AV, Pfitzner A. Layered Compounds BaFMgPn (Pn = P, As, Sb, and Bi), Transition-Metal-Free Representatives of the 1111 Structure Type. Inorg Chem 2019; 58:3435-3443. [PMID: 30788958 DOI: 10.1021/acs.inorgchem.8b03554] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Four new transition metal-free pnictide representatives of the LaOAgS structure type were predicted by DFT calculations and found in the BaFMgPn (Pn = P, As, Sb and Bi) family. The compounds adopt the tetragonal space group P4 /nmm with the unit cell parameters a/ c 4.3097(1) Å/9.5032(1) Å, 4.3855(1) Å/9.5918(1) Å, 4.5733(1) Å/9.8184(1) Å, and 4.6359(1) Å/9.8599(1) Å, respectively. According to the DFT calculations, these new compounds are semiconductors with band gaps steadily decreasing from Pn = P ( ca. 2 eV) to Pn = Bi ( ca. 1 eV). The corresponding strontium fluoride and rare-earth oxide analogs are unlikely to exist and have not been observed yet. The trends of the stability within 1111 and structurally and/or chemically related compounds based on a combined consideration of geometry and DFT calculations are discussed.
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Affiliation(s)
| | - Alexey N Kuznetsov
- Department of Chemistry , Lomonosov Moscow State University , 119991 Moscow , Russia.,Kurnakov Institute of General and Inorganic Chemistry RAS , 119991 Moscow , Russia
| | - Dmitri O Charkin
- Department of Chemistry , Lomonosov Moscow State University , 119991 Moscow , Russia
| | - Andrei V Shevelkov
- Department of Chemistry , Lomonosov Moscow State University , 119991 Moscow , Russia
| | - Arno Pfitzner
- Univeristy of Regensburg , 93053 Regensburg , Germany
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Plokhikh I, Charkin D, Verchenko V, Kuznetsov A, Tsirlin A, Kazakov S, Shevelkov A. Synthesis, crystal structure and physical properties of europium – manganese fluoride pnictides, EuMnPnF (Pn = P, As, Sb). J SOLID STATE CHEM 2018. [DOI: 10.1016/j.jssc.2017.12.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Plokhikh IV, Charkin DO, Verchenko VY, Kuznetsov AN, Kazakov SM, Tsirlin AA, Shevelkov AV. Structural and Thermodynamic Stability of the "1111" Structure Type: A Case Study of the EuFZnPn Series. Inorg Chem 2016; 55:12409-12418. [PMID: 27934435 DOI: 10.1021/acs.inorgchem.6b02297] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two new compounds with the LaOAgS structure, EuFZnAs (1) and EuFZnSb (2), were obtained via solid state reaction. Both compounds are tetragonal (P4/nmm) with the cell parameters a = 4.1000(1) Å and c = 9.0811(1) Å for 1 and a = 4.2852(1)Å and c = 9.4238(1)Å for 2. The absence of their phosphide analog can be explained based on crystal chemical considerations as well as on quantum-chemical estimates of their thermodynamic stability with respect to EuF2 and EuZn2Pn2. The magnetic response of 1 and 2 is ascribed to the presence of Eu2+ ions. Both compounds are paramagnetic down to low temperatures, where they order antiferromagnetically at ∼5 K and ∼3 K, respectively. They are narrow-gap semiconductors, and EuFZnSb demonstrates a relatively high value of the Seebeck coefficient.
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Affiliation(s)
- Igor V Plokhikh
- Department of Chemistry, Lomonosov Moscow State University , 119991 Moscow, Russia
| | - Dmitri O Charkin
- Department of Chemistry, Lomonosov Moscow State University , 119991 Moscow, Russia
| | - Valeriy Yu Verchenko
- Department of Chemistry, Lomonosov Moscow State University , 119991 Moscow, Russia.,National Institute of Chemical Physics and Biophysics , 12618 Tallinn, Estonia
| | - Alexey N Kuznetsov
- Department of Chemistry, Lomonosov Moscow State University , 119991 Moscow, Russia.,N.S. Kurnakov Institute of General and Inorganic Chemistry RAS , 119991 Moscow, Russia
| | - Sergey M Kazakov
- Department of Chemistry, Lomonosov Moscow State University , 119991 Moscow, Russia
| | - Alexander A Tsirlin
- Experimental Physics VI, Center for Correlations and Magnetism, Institute of Physics, University of Augsburg , 86135 Augsburg, Germany
| | - Andrei V Shevelkov
- Department of Chemistry, Lomonosov Moscow State University , 119991 Moscow, Russia
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Charkin DO, Akinfiev VS, Alekseeva AM, Batuk M, Abakumov AM, Kazakov SM. Synthesis and cation distribution in the new bismuth oxyhalides with the Sillén–Aurivillius intergrowth structures. Dalton Trans 2015; 44:20568-76. [DOI: 10.1039/c5dt02620b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Extensive synthetic and structural exploration of a new family of Sillen–Aurivillius intergrowth bismuth oxyhalides reveals clear size preferences for the alkaline earth cations and suggest a new stability criterion for complex intergrowth structures.
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Affiliation(s)
| | | | | | - Maria Batuk
- Electron Microscopy for Materials Science (EMAT)
- University of Antwerp
- Antwerp
- Belgium
| | - Artem M. Abakumov
- Department of Chemistry
- Moscow State University
- Moscow
- Russia
- Electron Microscopy for Materials Science (EMAT)
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Nuss J, Jansen M. New Ternary La 2Sb-Type Compounds, Sc RESb ( RE= La, Ce, Pr, Nd, Sm, Tb), and the Oxygen Stuffed Variant Sc 4Yb 4Sb 4O. Z Anorg Allg Chem 2014. [DOI: 10.1002/zaac.201300666] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Lin X, Stoyko SS, Mar A. Ternary rare-earth zinc arsenides REZn2As3 (RE=La–Pr) containing defect fluorite-type slabs. J SOLID STATE CHEM 2013. [DOI: 10.1016/j.jssc.2012.12.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ganguli AK, Prakash J, Thakur GS. The iron-age of superconductivity: structural correlations and commonalities among the various families having –Fe–Pn– slabs (Pn = P, As and Sb). Chem Soc Rev 2013; 42:569-98. [DOI: 10.1039/c2cs35090d] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Nuss J, Wedig U, Jansen M. Geometric Variations and Electron Localizations in Intermetallics: The Case of La2Sb Type Compounds. Z Anorg Allg Chem 2011. [DOI: 10.1002/zaac.201100331] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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