(Al,Mg)3La: a new phase in the MgAlLa system

Wong, C, Styles, M, Zhu, S, Qiu, D, McDonald, S, Zhu, Y, Gibson, M, Abbott, T and Easton, M 2018, '(Al,Mg)3La: a new phase in the MgAlLa system', Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials, vol. 74, no. 4, pp. 370-375.


Document type: Journal Article
Collection: Journal Articles

Title (Al,Mg)3La: a new phase in the MgAlLa system
Author(s) Wong, C
Styles, M
Zhu, S
Qiu, D
McDonald, S
Zhu, Y
Gibson, M
Abbott, T
Easton, M
Year 2018
Journal name Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials
Volume number 74
Issue number 4
Start page 370
End page 375
Total pages 6
Publisher Wiley-Blackwell Publishing, Inc.
Abstract During an investigation of the Mg-rich end of the MgAlLa system, a new ternary phase with the composition of (Al,Mg)3La was identified. The crystal structure of this phase was determined by conventional X-ray powder diffraction and transmission electron microscopy analysis and refined using high-resolution X-ray powder diffraction. The (Al,Mg)3La phase is found to have an orthorhombic structure with a space group of C2221 and lattice parameters of a = 4.3365 (1) Å, b = 18.8674 (4) Å and c = 4.4242 (1) Å, which is distinctly different from the binary Al3La phase (P63/mmc). The resolved structure of the (Al,Mg)3La phase is further verified by high-angle annular dark-field scanning transmission electron microscopy.
Subject Metals and Alloy Materials
Keyword(s) (Al
Mg)3La phase
high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) imaging
Rietveld refinement
simulated annealing
synchrotron powder diffraction
DOI - identifier 10.1107/S205252061800834X
Copyright notice © 2018 International Union of Crystallography
ISSN 2052-5192
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