Abstract
A single crystal of Al4(Cr,Fe) grown by the Czochralski method has been investigated using X-ray and also neutron diffraction. The average structure of this crystal with a composition of Al79.1Cr17.8Fe3.1 was found to be body-centered orthorhombic with the space group Immm. Using neutrons it was possible to distinguish the Fe and Cr positions within the structure. However, the diffraction patterns of both, X-ray as well as neutrons, showed additional reflections beyond the Bragg reflections violating the body-centering and reducing the space group symmetry to Pmm2. A renewed structure analysis taking also these additional reflections into account exhibits significant changes of about 30 % of the atomic positions. Features related to extra diffraction phenomena beyond the Bragg reflections are discussed in some detail.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Similar content being viewed by others
References
Sui HX, Liao XZ, Kuo KH, Zou X, Hovmöller S (1997) Structural model of the orthorhombic non-Fibonacci approximant in the Al12Fe2Cr alloy. Acta Crystallogr, Sect B 53:587–595
Sui HX, Liao XZ, Kuo KH (1995) A non-Fibonacci type of orthorhombic decagonal approximant. Philos Mag Lett 71:139–145
Deng DW, Mo ZM, Kuo KH (2004) Crystal structure of the orthorhombic Al4(Cr, Fe) approximant of the Al–Cr–Fe decagonal quasicrystal. J Phys Condens Matter 16:2283–2296
Pavlyuchkov D, Bauer B, Kowalski W, Surowiec M, Grushko B (2010) On the constitution of Al4(Cr, Fe). Intermetallics 18:22–26
Bendersky LA, Roth RS, Ramon JT, Shechtman D (1991) Crystallographic characterization of some intermetallic compounds in the Al–Cr system. Metall Trans A 22:5–10
Dolinšek J, Jeglič P, Komelj M, Vrtnik S, Smontara A, Smiljanić I, Bilušić A, Ivkov J, Stanić D, Zijlstra ES, Bauer B, Gille P (2007) Origin of anisotropic nonmetallic transport in the Al80Cr15Fe5 decagonal approximant. Phys Rev B 76:174207
Bauer B, Pedersen B, Gille P (2009) Al4(Cr, Fe): single crystal growth by the Czochralski method and structural investigation with neutrons at FRM II. Z Kristallogr 224:109–111
Bauer B (2010) Einkristallzüchtung und Charakterisierung Al-reicher komplexer metallischer Phasen in Al–Cr–Fe und benachbarten Systemen. Dissertation, LMU Munich
Bauer B, Gille P (2011) Crystal growth of Al-rich complex metallic phases in the system Al–Cr–Fe using the Czochralski method. Z Anorg Allg Chem 637:2052–2058
Petříček V, Dušek M, Palatinus L (2006) Jana2006. The crystallographic computing system. Institute of Physics, Praha
Acknowledgement
The authors would like to thank Dr. Sandra Altmannshofer for providing the X-ray data set.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2013 Springer Science+Business Media Dordrecht
About this paper
Cite this paper
Bauer, B., Pedersen, B., Frey, F. (2013). Al4(Cr,Fe): A Structure Survey. In: Schmid, S., Withers, R., Lifshitz, R. (eds) Aperiodic Crystals. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-6431-6_22
Download citation
DOI: https://doi.org/10.1007/978-94-007-6431-6_22
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-007-6430-9
Online ISBN: 978-94-007-6431-6
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)