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Structural complexity of the intermetallic compound o-Al13Co4

MPS-Authors
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Simon,  Paul
Paul Simon, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zelenina,  Iryna
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Ramlau,  Reiner
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Carrillo-Cabrera,  Wilder
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Burkhardt,  Ulrich
Ulrich Burkhardt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Borrmann,  Horst
Horst Borrmann, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Cardoso Gil,  Raul
Raul Cardoso, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Grin,  Yuri
Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Simon, P., Zelenina, I., Ramlau, R., Carrillo-Cabrera, W., Burkhardt, U., Borrmann, H., et al. (2020). Structural complexity of the intermetallic compound o-Al13Co4. Journal of Alloys and Compounds, 820: 153363, pp. 1-11. doi:10.1016/j.jallcom.2019.153363.


Cite as: http://hdl.handle.net/21.11116/0000-0005-5B6B-E
Abstract
The crystal structure of the complex intermetallic phase o-Al13Co4 was first investigated in 1994, but some open questions still remained. The new refinement of the crystal structure using high-resolution X-ray diffraction data resulted in a much more complex model including a large number of split positions (space group Pnm21, a = 8.1590(6) Å, b = 12.349(1) Å, c = 14.453(1) Å). The model is interpreted in terms of local violation of the translational symmetry, which is confirmed by HRTEM and HRSTEM investigations. Chemical bonding between two partial structures in o-Al13Co4