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Volkova OS, Shvanskaya LV, Ovchenkov EA, Zvereva EA, Volkov AS, Chareev DA, Molla K, Rahaman B, Saha-Dasgupta T, Vasiliev AN. Structure-Property Relationships in α-, β'-, and γ-Modifications of Mn 3(PO 4) 2. Inorg Chem 2016; 55:10692-10700. [PMID: 27661209 DOI: 10.1021/acs.inorgchem.6b01942] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The manganese orthophosphate, Mn3(PO4)2, is characterized by the rich variety of polymorphous modifications, α-, β'-, and γ-phases, crystallized in monoclinic P21/c (P21/n) space group type with unit cell volume ratios of 2:6:1. The crystal structures of these phases are constituted by three-dimensional framework of corner- and edge-sharing [MnO5] and [MnO6] polyhedra strengthened by [PO4] tetrahedra. All compounds experience long-range antiferromagnetic order at Neel temperature TN = 21.9 K (α-phase), 12.3 K (β'-phase), and 13.3 K (γ-phase). Additionally, second magnetic phase transition takes place at T* = 10.3 K in β'-phase. The magnetization curves of α- and β'-modifications evidence spin-floplike features at B = 1.9 and 3.7 T, while the γ-Mn3(PO4)2 stands out for an extended one-third magnetization plateau stabilized in the range of magnetic field B = 7.5-23.5 T. The first-principles calculations define the main paths of superexchange interaction between Mn spins in these polymorphs. The spin model for α-phase is found to be characterized by collection of uniform and alternating chains, which are coupled in all three directions. The strongest magnetic exchange interaction in γ-phase emphasizes the trimer units, which make chains that are in turn weakly coupled to each other. The spin model of β'-phase turns out to be more complex compared to α- or γ-phase. It shows complex chain structures involving exchange interactions between Mn2 (Mn2', Mn2″) and Mn3 (Mn3', Mn3″). These chains interact through exchanges involving Mn1 (Mn1', Mn1″) spins.
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Affiliation(s)
- Olga S Volkova
- M. V. Lomonosov Moscow State University , Moscow 119991, Russia.,National University of Science and Technology , Moscow 119049, Russia.,Ural Federal University , Ekaterinburg 620002, Russia
| | - Larisa V Shvanskaya
- M. V. Lomonosov Moscow State University , Moscow 119991, Russia.,National University of Science and Technology , Moscow 119049, Russia
| | | | - Elena A Zvereva
- M. V. Lomonosov Moscow State University , Moscow 119991, Russia
| | | | - Dmitriy A Chareev
- Ural Federal University , Ekaterinburg 620002, Russia.,Institute of Experimental Mineralogy, RAS , Chernogolovka 142432, Russia.,Institute of Geology and Petroleum Technologies, Kazan Federal University , Kazan 42008, Russia
| | | | | | | | - Alexander N Vasiliev
- M. V. Lomonosov Moscow State University , Moscow 119991, Russia.,National University of Science and Technology , Moscow 119049, Russia.,Ural Federal University , Ekaterinburg 620002, Russia
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Bronova A, Droß T, Glaum R, Lueken H, Speldrich M, Urland W. Comprehensive Characterization of the Electronic Structure of U4+ in Uranium(IV) Phosphate Chloride. Inorg Chem 2016; 55:6848-52. [DOI: 10.1021/acs.inorgchem.6b00438] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anna Bronova
- Institute
of Inorganic Chemistry, Rheinische Friedrich-Wilhelms-Universität, Gerhard-Domagk-Straße 1, D-53121 Bonn, Germany
| | - Thomas Droß
- Institute
of Inorganic Chemistry, Rheinische Friedrich-Wilhelms-Universität, Gerhard-Domagk-Straße 1, D-53121 Bonn, Germany
| | - Robert Glaum
- Institute
of Inorganic Chemistry, Rheinische Friedrich-Wilhelms-Universität, Gerhard-Domagk-Straße 1, D-53121 Bonn, Germany
| | - Heiko Lueken
- Institute
of Inorganic Chemistry, RWTH Aachen, Professor-Pirlet-Str. 1, D-52074 Aachen, Germany
| | - Manfred Speldrich
- Institute
of Inorganic Chemistry, RWTH Aachen, Professor-Pirlet-Str. 1, D-52074 Aachen, Germany
| | - Werner Urland
- Institute
of Inorganic Chemistry, Leibniz Universität Hannover, Callinstrasse
9, D-30167 Hannover, Germany
- Chemistry
Department, University of Fribourg, Chemin du Musée 9, CH-1700 Fribourg, Switzerland
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Souiwa K, Chennabasappa M, Decourt R, Ben Amara M, Hidouri M, Toulemonde O. Novel Mixed Cobalt/Chromium Phosphate NaCoCr2(PO4)3 Showing Spin-Flop Transition. Inorg Chem 2015; 54:7345-52. [PMID: 26161799 DOI: 10.1021/acs.inorgchem.5b00776] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We describe the synthesis and the crystallographic and magnetic properties of a novel NaCoCr2(PO4)3 phosphate. A conventional solid-state reaction was used to obtain single-phase powders. A Rietveld analysis of powder X-ray diffraction data proposes an orthorhombic symmetry similar to α-CrPO4-type structure in space group Imma with the following unit cell parameters: a = 10.413(1) Å; b = 13.027(1) Å; c = 6.372(1) Å. The framework consists of PO4 tetrahedra, M(1)O6 (M(1) = Cr) octahedra, and M(2)2O10 (M(2) = 0.5Cr+0.5Co) binuclear unit of edge-sharing MO6 octahedra. It can be described in terms of two building blocks: sheets consisting of corner-sharing M(2)2O10 units with PO4 tetrahedra found parallel to the (b,c) plane, and chains made by corner-sharing CrO6 octahedra and PO4 tetrahedra running along the b axis. From the interconnection of the sheets and chains, a 3D rigid skeleton is formed, exhibiting two kinds of intersecting tunnel channels containing the Na(+) ions. The proposed structure derives from the α-CrPO4-type structure considering a positive charge balance according to the equation Cr(3+) → Co(2+) + Na(+), resulting in sodium countercation introduction within the unoccupied channels shown in the α-CrPO4 framework. Temperature-dependent DC and AC magnetic susceptibility is indicative of a long-range magnetic ordering occurring at 32 K. Further, spin-flop transition sheds light on a chromium-based phosphate for the first time.
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Islam SM, Glaum R, Pelka A, Daniels J, Hoffbauer W. The First Phosphates of Heptavalent Rhenium. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201300289] [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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Liu Q, He H, Chao ZS, Xie J, Ruchenstein E. Synthesis of mesoporous chromium phosphatesvia solid-state reaction at low temperature. NEW J CHEM 2012. [DOI: 10.1039/c1nj20252a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Glaum R, Hammer E, Hermes W, Pöttgen R. Synthese und Charakterisierung von β-Chrom(II)-orthophosphat. Z Anorg Allg Chem 2011. [DOI: 10.1002/zaac.201100089] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Lenz M, Gruehn R. Developments in Measuring and Calculating Chemical Vapor Transport Phenomena Demonstrated on Cr, Mo, W, and Their Compounds. Chem Rev 1997; 97:2967-2994. [PMID: 11851483 DOI: 10.1021/cr940313a] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. Lenz
- Institut für Anorganische und Analytische Chemie, Justus-Liebig-Universität, Heinrich-Buff-Ring 58, D-35392 Giessen, Germany
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