Journal Article

FZJ-2020-02990

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Structural complexity of the intermetallic compound o-Al13Co4

Simon, P. ; Zelenina, I. ; Ramlau, R. ; Carrillo-Cabrera, W. ; Burkhardt, U. ; Borrmann, H. ; Gil, R. C. ; Feuerbacher, M.FZJ* ; Gille, P. ; Grin, Y. (Corresponding author)

2020
ScienceDirect Amsterdam [u.a.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/25750  doi:10.1016/j.jallcom.2019.153363

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 - three-dimensional framework and linear Co–Al–Co groups in cages of the latter – along with the stacking faults (local twinning) are discussed as possible reasons for such an extended disorder. Previous article in issue

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Contributing Institute(s):

1. Mikrostrukturforschung (PGI-5)

Research Program(s):

1. 144 - Controlling Collective States (POF3-144) (POF3-144)

Appears in the scientific report 2020

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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