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

Charlotte Wong; Mark J. Styles; Suming Zhu; Dong Qiu; Stuart D. McDonald; Yuman Zhu; Mark A. Gibson; Trevor B. Abbott; Mark A. Easton

doi:10.1107/S205252061800834X

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

Charlotte Wong, Mark J. Styles, Suming Zhu, Dong Qiu, Stuart D. McDonald, Yuman Zhu, Mark A. Gibson, Trevor B. Abbott, Mark A. Easton

Materials Science & Engineering

Research output: Contribution to journal › Article › Research › peer-review

14 Citations (Scopus)

Abstract

During an investigation of the Mg-rich end of the Mg–Al–La 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.

Original language	English
Pages (from-to)	370-375
Number of pages	6
Journal	Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials
Volume	74
Issue number	4
DOIs	https://doi.org/10.1107/S205252061800834X
Publication status	Published - 1 Aug 2018

Keywords

(Al,Mg)La phase
high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) imaging
Rietveld refinement
simulated annealing
synchrotron powder diffraction

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10.1107/S205252061800834X

271695877-oaFinal published version, 0.99 MB

Cite this

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title = "(Al,Mg)3La: a new phase in the Mg–Al–La system",

abstract = "During an investigation of the Mg-rich end of the Mg–Al–La 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) {\AA}, b = 18.8674 (4) {\AA} and c = 4.4242 (1) {\AA}, 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.",

keywords = "(Al,Mg)La phase, high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) imaging, Rietveld refinement, simulated annealing, synchrotron powder diffraction",

author = "Charlotte Wong and Styles, {Mark J.} and Suming Zhu and Dong Qiu and McDonald, {Stuart D.} and Yuman Zhu and Gibson, {Mark A.} and Abbott, {Trevor B.} and Easton, {Mark A.}",

year = "2018",

month = aug,

day = "1",

doi = "10.1107/S205252061800834X",

language = "English",

volume = "74",

pages = "370--375",

journal = "Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials",

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publisher = "International Union of Crystallography (IUCr)",

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TY - JOUR

T1 - (Al,Mg)3La

T2 - a new phase in the Mg–Al–La system

AU - Wong, Charlotte

AU - Styles, Mark J.

AU - Zhu, Suming

AU - Qiu, Dong

AU - McDonald, Stuart D.

AU - Zhu, Yuman

AU - Gibson, Mark A.

AU - Abbott, Trevor B.

AU - Easton, Mark A.

PY - 2018/8/1

Y1 - 2018/8/1

N2 - During an investigation of the Mg-rich end of the Mg–Al–La 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.

AB - During an investigation of the Mg-rich end of the Mg–Al–La 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.

KW - (Al,Mg)La phase

KW - high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) imaging

KW - Rietveld refinement

KW - simulated annealing

KW - synchrotron powder diffraction

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U2 - 10.1107/S205252061800834X

DO - 10.1107/S205252061800834X

M3 - Article

AN - SCOPUS:85052192449

VL - 74

SP - 370

EP - 375

JO - Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials

JF - Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials

SN - 2052-5206

IS - 4

ER -

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

Abstract

Keywords

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Other files and links

Australian Synchrotron

Centre for Electron Microscopy (MCEM)

Cite this

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

Abstract

Keywords

Access to Document

Other files and links

Equipment

Australian Synchrotron

Centre for Electron Microscopy (MCEM)

Cite this

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