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Skaggs C, Siegfried PE, Cho JS, Xin Y, Garlea VO, Taddei KM, Bhandari H, Croft M, Ghimire NJ, Jang JI, Tan X. Ba 4RuMn 2O 10: A Noncentrosymmetric Polar Crystal Structure with Disordered Trimers. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2024; 36:6053-6061. [PMID: 38947978 PMCID: PMC11210430 DOI: 10.1021/acs.chemmater.4c00586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 05/06/2024] [Accepted: 05/22/2024] [Indexed: 07/02/2024]
Abstract
Phase-pure polycrystalline Ba4RuMn2O10 was prepared and determined to adopt the noncentrosymmetric polar crystal structure (space group Cmc21) based on results of second harmonic generation, convergent beam electron diffraction, and Rietveld refinements using powder neutron diffraction data. The crystal structure features zigzag chains of corner-shared trimers, which contain three distorted face-sharing octahedra. The three metal sites in the trimers are occupied by disordered Ru/Mn with three different ratios: Ru1:Mn1 = 0.202(8):0.798(8), Ru2:Mn2 = 0.27(1):0.73(1), and Ru3:Mn3 = 0.40(1):0.60(1), successfully lowering the symmetry and inducing the polar crystal structure from the centrosymmetric parent compounds Ba4T3O10 (T = Mn, Ru; space group Cmca). The valence state of Ru/Mn is confirmed to be +4 according to X-ray absorption near-edge spectroscopy. Ba4RuMn2O10 is a narrow bandgap (∼0.6 eV) semiconductor exhibiting spin-glass behavior with strong magnetic frustration and antiferromagnetic interactions.
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Affiliation(s)
- Callista
M. Skaggs
- Department
of Chemistry and Biochemistry, George Mason
University, Fairfax, Virginia 22030, United States
| | - Peter E. Siegfried
- Department
of Physics and Astronomy, George Mason University, Fairfax, Virginia 22030, United States
- Quantum
Science and Engineering Center, George Mason
University, Fairfax, Virginia 22030, United States
| | - Jun Sang Cho
- Department
of Physics, Sogang University, Seoul 04017, Republic of Korea
| | - Yan Xin
- National
High Magnetic Field Laboratory, Florida
State University, Tallahassee, Florida 32310, United States
| | - V. Ovidiu Garlea
- Neutron Scattering
Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Keith M. Taddei
- Neutron Scattering
Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- X-ray
Science
Division, Advanced Photon Source, Argonne
National Laboratory, Lemont, Illinois 60439, United States
| | - Hari Bhandari
- Department
of Physics and Astronomy, George Mason University, Fairfax, Virginia 22030, United States
- Department
of Physics and Astronomy and Stavropoulos Center for Complex Quantum
Matter, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Mark Croft
- Department
of Physics and Astronomy, Rutgers, The State
University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Nirmal J. Ghimire
- Department
of Physics and Astronomy and Stavropoulos Center for Complex Quantum
Matter, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Joon I. Jang
- Department
of Physics, Sogang University, Seoul 04017, Republic of Korea
| | - Xiaoyan Tan
- Department
of Chemistry and Biochemistry, George Mason
University, Fairfax, Virginia 22030, United States
- Quantum
Science and Engineering Center, George Mason
University, Fairfax, Virginia 22030, United States
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Hiley CI, Lees MR, Fisher JM, Thompsett D, Agrestini S, Smith RI, Walton RI. Ruthenium(V) oxides from low-temperature hydrothermal synthesis. Angew Chem Int Ed Engl 2014; 53:4423-7. [PMID: 24644102 DOI: 10.1002/anie.201310110] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Revised: 01/21/2014] [Indexed: 11/09/2022]
Abstract
Low-temperature (200 °C) hydrothermal synthesis of the ruthenium oxides Ca1.5 Ru2 O7 , SrRu2 O6 , and Ba2 Ru3 O9 (OH) is reported. Ca1.5 Ru2 O7 is a defective pyrochlore containing Ru(V/VI) ; SrRu2 O6 is a layered Ru(V) oxide with a PbSb2 O6 structure, whilst Ba2 Ru3 O9 (OH) has a previously unreported structure type with orthorhombic symmetry solved from synchrotron X-ray and neutron powder diffraction. SrRu2 O6 exhibits unusually high-temperature magnetic order, with antiferromagnetism persisting to at least 500 K, and refinement using room temperature neutron powder diffraction data provides the magnetic structure. All three ruthenates are metastable and readily collapse to mixtures of other oxides upon heating in air at temperatures around 300-500 °C, suggesting they would be difficult, if not impossible, to isolate under conventional high-temperature solid-state synthesis conditions.
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Affiliation(s)
- Craig I Hiley
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL (UK)
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Hiley CI, Lees MR, Fisher JM, Thompsett D, Agrestini S, Smith RI, Walton RI. Ruthenium(V) Oxides from Low-Temperature Hydrothermal Synthesis. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201310110] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Talley A, Kelley AF, Bond MR. Poly[tetrakis( n-propylammonium) [octa-μ-chlorido-dichloridotrinickelate(II)]]: a hybrid organic–inorganic layer compound in the Cs 4Mg 3F 10structure type. Acta Crystallogr C 2011; 67:m395-9. [DOI: 10.1107/s0108270111050116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Accepted: 11/22/2011] [Indexed: 11/11/2022] Open
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