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Sandemann JR, Støckler KAH, Wang X, Chakoumakos BC, Iversen BB. Benchmark Crystal Structure of Defect-Free Spinel ZnFe 2O 4. J Am Chem Soc 2023; 145:21053-21065. [PMID: 37706460 DOI: 10.1021/jacs.3c07334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/15/2023]
Abstract
Accurate structural models are of paramount importance for elucidating structure-property relationships in functional materials. Spinels (AB2O4) form a highly important family of materials with complex crystal structures, and subtle structural details have a critical bearing on understanding their physical properties. In some spinels, the space group symmetry is debated, and in general, point defects such as cation inversion and interstitials add complexity. Most studies of spinels concern powder materials, and this challenges deep structural characterization. In fact, most published spinel structures have dubious atomic displacement parameters (ADPs), which is a typical sign of problematic structural description in the refinement of diffraction data. Here, we use various X-ray and neutron diffraction techniques to establish a benchmark crystal structure for the essentially defect-free spinel ferrite ZnFe2O4, which is a widely studied frustrated magnet. It is shown that the appearance of Fd3̅m forbidden reflections in the ZnFe2O4 single-crystal neutron diffraction data is an artifact of multiple scattering rather than the loss of inversion symmetry. We then provide benchmark ADPs and demonstrate how strongly these parameters affect the refined cation inversion. The ADPs reported here may be used as reference data to test the soundness of refined structural models, possibly to constrain those based on suboptimal data quality, and thereby provide a more accurate fundamental understanding of the structure-property relationship in spinel-type materials.
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Affiliation(s)
- Jonas Ruby Sandemann
- Center for Integrated Materials Research, Department of Chemistry and iNANO, Aarhus University, DK-8000 Aarhus C, Denmark
| | | | - Xiaoping Wang
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Bryan C Chakoumakos
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Bo Brummerstedt Iversen
- Center for Integrated Materials Research, Department of Chemistry and iNANO, Aarhus University, DK-8000 Aarhus C, Denmark
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2
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Jose V, Jose V, Freeda Christy CE, Nesaraj AS. Spinel-based electrode materials for application in electrochemical supercapacitors – present status and future prospects. INORG NANO-MET CHEM 2021. [DOI: 10.1080/24701556.2021.1956968] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Vismaya Jose
- Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed to be University), Coimbatore, Tamil Nadu, India
| | - Vinaya Jose
- Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed to be University), Coimbatore, Tamil Nadu, India
| | - Clementz Edwardraj Freeda Christy
- Department of Civil Engineering, Karunya Institute of Technology and Sciences (Deemed to be University), Coimbatore, Tamil Nadu, India
| | - Arputharaj Samson Nesaraj
- Department of Applied Chemistry, Karunya Institute of Technology and Sciences (Deemed to be University), Coimbatore, Tamil Nadu, India
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3
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Talanov MV, Talanov VM. Formation of breathing pyrochlore lattices: structural, thermodynamic and crystal chemical aspects. CrystEngComm 2020. [DOI: 10.1039/c9ce01635j] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structural diversity of breathing pyrochlore lattices was investigated on the example of ordered pyrochlores in terms of group-theoretical analysis, Landau thermodynamics and crystal chemistry.
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Affiliation(s)
- Mikhail V. Talanov
- Research Institute of Physics
- Southern Federal University
- Rostov-on-Don 344090
- Russia
| | - Valeriy M. Talanov
- Technological Department
- South-Russian State Polytechnic University
- Novocherkassk 346428
- Russia
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Elias I, Soon A, Huang J, S Haynes B, Montoya A. Atomic order, electronic structure and thermodynamic stability of nickel aluminate. Phys Chem Chem Phys 2019; 21:25952-25961. [PMID: 31584585 DOI: 10.1039/c9cp04325j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The atomic order, electronic structure and thermodynamic stability of nickel aluminate, NiAl2O4, have been analyzed using periodic density functional theory and cluster expansion. NiAl2O4 forms a tetragonal structure with P4122 space group. At temperatures below 800 K, it is an inverse spinel, with Ni occupying the octahedral sites and Al occupying both the octahedral and the tetrahedral sites. Some Niocta + Altetra ⇌ Nitetra + Alocta exchange occurs above 800 K, but the structure remains largely inverse at high temperatures, with about 95% Niocta at 1500 K. Various functionals, with and without van der Waals corrections, were used to predict the experimental formation energy, lattice parameters and electronic structure. In all cases, the NiAl2O4 is found to be ferromagnetic and a semiconductor with an indirect band gap along the Γ → M symmetry points. NiAl2O4 is found to be thermodynamically stable at operating conditions of 900-1000 K and 1 atm relative to its competing oxide phases, NiO and Al2O3.
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Affiliation(s)
- Ishfaque Elias
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW 2006, Australia.
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Affiliation(s)
- B. C. De Cooman
- Department of Materials Science and Engineering, Cornell University, Ithaca, N.Y., U.S.A
| | - C. B. Carter
- Department of Materials Science and Engineering, Cornell University, Ithaca, N.Y., U.S.A
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Ma Y, Liu X. Kinetics and Thermodynamics of Mg-Al Disorder in MgAl 2O 4-Spinel: A Review. Molecules 2019; 24:molecules24091704. [PMID: 31052437 PMCID: PMC6540108 DOI: 10.3390/molecules24091704] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 04/27/2019] [Accepted: 04/28/2019] [Indexed: 11/25/2022] Open
Abstract
The MgAl2O4-spinel has wide applications in various industries and in geosciences. It shows a significant inter-site Mg-Al cation exchange (denoted by the inversion parameter x), which modifies structural features, such as the unit-cell parameters and the sizes of the component polyhedra, and influences the physical and chemical properties. Previous studies mainly focused on the kinetics and thermodynamics of the Mg-Al exchange reaction, with the aim to ascertain the correlation between the inversion parameter and temperature; these studies, however, reached conflicting results. Here, we first reviewed the kinetics studies on the Mg-Al cation exchange reaction, and then reviewed all thermodynamic experiments, with special attention paid to the Mg-Al cation exchange equilibrium and the quench process, which might have modified the cation distributions once attained at high temperatures. We also assessed the accuracies in the temperature measurements and in the quantifications of the x by different analytical methods. With some necessary temperature correction and data removal, we have landed with a generally reliable x-T dataset covering the T-x space of 873 < T < 1887 K and 0.18(1) < x < 0.357(60) (71 data pairs in total). Fitting these x-T data to three most commonly used thermodynamic models, we have obtained more accurate model parameters. Further, we also evaluated the constituent items of the Gibbs free energy for the Mg-Al cation exchange reaction with experimental results from different research fields and reached the conclusion that highly possibly the TΔSD should not be neglected. Based on this review, we suggest that: (1) Further kinetics study on the Mg-Al exchange reaction should be performed at both low T (<~973 K) and high T (>~1173 K); (2) further Mg-Al exchange equilibrium studies should be carried out at relatively low T and ambient P, as well as in vast ranges of simultaneous high P and high T; and (3) direct experimental measures about the entropies or the enthalpies of the MgAl2O4-spinels disordered to different extents should be conducted with full characterization of the starting materials and detailed description of the experimental procedures.
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Affiliation(s)
- Yunlu Ma
- School of Earth and Space Sciences, Peking University, Beijing 100871, China.
- Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education of China, Beijing 100871, China.
| | - Xi Liu
- School of Earth and Space Sciences, Peking University, Beijing 100871, China.
- Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education of China, Beijing 100871, China.
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O’Quinn EC, Shamblin J, Perlov B, Ewing RC, Neuefeind J, Feygenson M, Gussev I, Lang M. Inversion in Mg1–xNixAl2O4 Spinel: New Insight into Local Structure. J Am Chem Soc 2017; 139:10395-10402. [DOI: 10.1021/jacs.7b04370] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Eric C. O’Quinn
- Department
of Nuclear Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Jacob Shamblin
- Department
of Nuclear Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
- Department
of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Brandon Perlov
- Department
of Nuclear Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Rodney C. Ewing
- Department
of Geological Sciences, Stanford University, Stanford, California 94305-2115, United States
| | - Joerg Neuefeind
- Chemical
and Engineering Materials Division, Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Mikhail Feygenson
- Jülich
Center for Neutron Science, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
| | - Igor Gussev
- Department
of Nuclear Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Maik Lang
- Department
of Nuclear Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
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Lin JF, Wu J, Zhu J, Mao Z, Said AH, Leu BM, Cheng J, Uwatoko Y, Jin C, Zhou J. Abnormal elastic and vibrational behaviors of magnetite at high pressures. Sci Rep 2014; 4:6282. [PMID: 25186916 PMCID: PMC4153994 DOI: 10.1038/srep06282] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Accepted: 08/14/2014] [Indexed: 11/09/2022] Open
Abstract
Magnetite exhibits unique electronic, magnetic, and structural properties in extreme conditions that are of great research interest. Previous studies have suggested a number of transitional models, although the nature of magnetite at high pressure remains elusive. We have studied a highly stoichiometric magnetite using inelastic X-ray scattering, X-ray diffraction and emission, and Raman spectroscopies in diamond anvil cells up to ~20 GPa, while complementary electrical conductivity measurements were conducted in a cubic anvil cell up to 8.5 GPa. We have observed an elastic softening in the diagonal elastic constants (C11 and C44) and a hardening in the off-diagonal constant (C12) at ~8 GPa where significant elastic anisotropies in longitudinal and transverse acoustic waves occur, especially along the [110] direction. An additional vibrational Raman band between the A1g and T2g modes was also detected at the transition pressure. These abnormal elastic and vibrational behaviors of magnetite are attributed to the occurrence of the octahedrally-coordinated Fe2+-Fe3+-Fe2+ ions charge-ordering along the [110] direction in the inverse spinel structure. We propose a new phase diagram of magnetite in which the temperature for the metal-insulator and distorted structural transitions decreases with increasing pressure while the charge-ordering transition occurs at ~8 GPa and room temperature.
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Affiliation(s)
- Jung-Fu Lin
- 1] Department of Geological Sciences, Jackson School of Geosciences, The University of Texas at Austin, TX 78712, USA [2] Texas Materials Institute, The University of Texas at Austin, TX 78712, USA [3] Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai, China
| | - Junjie Wu
- 1] Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai, China [2] Institute of Physics, Chinese Academy of Sciences, Beijing, China
| | - Jie Zhu
- Institute of Physics, Chinese Academy of Sciences, Beijing, China
| | - Zhu Mao
- 1] Department of Geological Sciences, Jackson School of Geosciences, The University of Texas at Austin, TX 78712, USA [2] Laboratory of Seismology and Physics of Earth's Interior, School of Earth and Planetary Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Ayman H Said
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Bogdan M Leu
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Jinguang Cheng
- 1] Texas Materials Institute, The University of Texas at Austin, TX 78712, USA [2] Department of Mechanical Engineering, The University of Texas at Austin, TX 78712, USA [3] Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Yoshiya Uwatoko
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Changqing Jin
- Institute of Physics, Chinese Academy of Sciences, Beijing, China
| | - Jianshi Zhou
- 1] Texas Materials Institute, The University of Texas at Austin, TX 78712, USA [2] Department of Mechanical Engineering, The University of Texas at Austin, TX 78712, USA
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Grimes RW, Binks DJ, Lidiard AB. The extent of zinc oxide solution in zinc chromate spinel. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/01418619508243791] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Raman spectroscopic study of magnetite (FeFe2O4): a new assignment for the vibrational spectrum. J SOLID STATE CHEM 2003. [DOI: 10.1016/s0022-4596(03)00294-9] [Citation(s) in RCA: 595] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Basso R, Carbonin S, Giusta AD. Cation and vacancy distribution in a synthetic defect spinel. ACTA ACUST UNITED AC 1991. [DOI: 10.1524/zkri.1991.194.1-2.111] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Talanov VM. Structural mechanism of the ordering of ions in tetrahedral holes in spinels. J STRUCT CHEM+ 1986. [DOI: 10.1007/bf00751748] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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