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Updated: Jul 16, 2026
08:49
Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films
Published on: December 4, 2014
Twinning and structure of Eu(0.6)Sr(0.4)MnO3
Rafael Tamazyan1, Nicola Rotiroti, Sander van Smaalen
1Molecule Structure Research Center, National Academy of Science Ra, Azatutyan ave. 26, 375014 Yerevan, Armenia. rafael@msrc.am
Summary
The crystal structure of europium strontium manganese trioxide was refined, revealing Jahn-Teller distorted MnO6 octahedra and distinct crystallographic sites for europium and strontium cations.
Area of Science:
- Solid-state chemistry
- Crystallography
- Materials science
Background:
- Europium strontium manganese trioxide (Eu(0.6)Sr(0.4)MnO3) is a complex oxide with potential applications in materials science.
- Understanding its crystal structure is crucial for predicting and controlling its properties.
Purpose of the Study:
- To refine the crystal structure of Eu(0.6)Sr(0.4)MnO3.
- To investigate the coordination and site occupancy of Eu3+ and Sr2+ cations.
- To analyze the distortions of MnO6 octahedra and their impact on crystal symmetry.
Main Methods:
- Single-crystal X-ray diffraction on a multiply twinned crystal with six twin components.
- Refinement of site occupancies.
- Analysis of difference Fourier maps.
Main Results:
- The crystal structure was refined in the orthorhombic space group Pbnm.
- Jahn-Teller distortions were observed in the MnO6 octahedra, exhibiting near fourfold symmetry.
- Eu3+ and Sr2+ cations were found to occupy distinct crystallographic positions with eightfold and twelvefold coordination, respectively.
- Octahedral tilting significantly reduced the overall crystal symmetry.
Conclusions:
- The detailed crystal structure of Eu(0.6)Sr(0.4)MnO3 has been elucidated.
- The specific coordination environments of Eu3+ and Sr2+ ions provide insights into the cation ordering within the material.
- The interplay between Jahn-Teller distortions and octahedral tilting dictates the observed orthorhombic symmetry.
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