Electron Diffraction Study of the Space Group Variation in the Al–Mn–Pt T-Phase

Rimon Tamari; Benjamin Grushko; Louisa Meshi

doi:https://doi.org/10.3390/sym14010038

Electron Diffraction Study of the Space Group Variation in the Al–Mn–Pt T-Phase

Rimon Tamari, Benjamin Grushko, Louisa Meshi

Department of Materials Engineering

Ben-Gurion University of the Negev

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

Abstract

Binary high temperature “Al₃Mn” (T-phase) and its extensions in ternary systems were the subjects of numerous crystallographic investigations. The results were ambiguous regarding the existence or lack of the center of symmetry: both Pna2₁ and Pnam space groups were reported. Our research on the Al–Mn–Pt T-phase allowed concluding that inside a continuous homogeneity region, the structure of the Al-rich T-phase (e.g., Al₇₈Mn_17.5Pt_4.5 ) belongs to the non-centrosymmetric Pna2₁ space group, while the structure of the Al-poor T-phase (such as Al_71.3Mn_25.1Pt_3.6 ) is centrosymmetric, i.e., Pnam. Following metallurgical and crystallographic considerations, the change in the symmetry was explained.

Original language	American English
Article number	38
Journal	Symmetry
Volume	14
Issue number	1
DOIs	https://doi.org/10.3390/sym14010038
State	Published - 1 Jan 2022

Keywords

AlMn
Aluminide
Center of symmetry
Convergent Beam Electron Diffraction (CBED)
Space group

All Science Journal Classification (ASJC) codes

Computer Science (miscellaneous)
Chemistry (miscellaneous)
General Mathematics
Physics and Astronomy (miscellaneous)

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Cite this

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title = "Electron Diffraction Study of the Space Group Variation in the Al–Mn–Pt T-Phase",

abstract = "Binary high temperature “Al3Mn” (T-phase) and its extensions in ternary systems were the subjects of numerous crystallographic investigations. The results were ambiguous regarding the existence or lack of the center of symmetry: both Pna21 and Pnam space groups were reported. Our research on the Al–Mn–Pt T-phase allowed concluding that inside a continuous homogeneity region, the structure of the Al-rich T-phase (e.g., Al78Mn17.5Pt4.5 ) belongs to the non-centrosymmetric Pna21 space group, while the structure of the Al-poor T-phase (such as Al71.3Mn25.1Pt3.6 ) is centrosymmetric, i.e., Pnam. Following metallurgical and crystallographic considerations, the change in the symmetry was explained.",

keywords = "AlMn, Aluminide, Center of symmetry, Convergent Beam Electron Diffraction (CBED), Space group",

author = "Rimon Tamari and Benjamin Grushko and Louisa Meshi",

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T1 - Electron Diffraction Study of the Space Group Variation in the Al–Mn–Pt T-Phase

AU - Tamari, Rimon

AU - Grushko, Benjamin

AU - Meshi, Louisa

PY - 2022/1/1

Y1 - 2022/1/1

N2 - Binary high temperature “Al3Mn” (T-phase) and its extensions in ternary systems were the subjects of numerous crystallographic investigations. The results were ambiguous regarding the existence or lack of the center of symmetry: both Pna21 and Pnam space groups were reported. Our research on the Al–Mn–Pt T-phase allowed concluding that inside a continuous homogeneity region, the structure of the Al-rich T-phase (e.g., Al78Mn17.5Pt4.5 ) belongs to the non-centrosymmetric Pna21 space group, while the structure of the Al-poor T-phase (such as Al71.3Mn25.1Pt3.6 ) is centrosymmetric, i.e., Pnam. Following metallurgical and crystallographic considerations, the change in the symmetry was explained.

AB - Binary high temperature “Al3Mn” (T-phase) and its extensions in ternary systems were the subjects of numerous crystallographic investigations. The results were ambiguous regarding the existence or lack of the center of symmetry: both Pna21 and Pnam space groups were reported. Our research on the Al–Mn–Pt T-phase allowed concluding that inside a continuous homogeneity region, the structure of the Al-rich T-phase (e.g., Al78Mn17.5Pt4.5 ) belongs to the non-centrosymmetric Pna21 space group, while the structure of the Al-poor T-phase (such as Al71.3Mn25.1Pt3.6 ) is centrosymmetric, i.e., Pnam. Following metallurgical and crystallographic considerations, the change in the symmetry was explained.

KW - AlMn

KW - Aluminide

KW - Center of symmetry

KW - Convergent Beam Electron Diffraction (CBED)

KW - Space group

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U2 - https://doi.org/10.3390/sym14010038

DO - https://doi.org/10.3390/sym14010038

M3 - Article

SN - 2073-8994

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JO - Symmetry

JF - Symmetry

IS - 1

M1 - 38

ER -

Electron Diffraction Study of the Space Group Variation in the Al–Mn–Pt T-Phase

Abstract

Keywords

All Science Journal Classification (ASJC) codes

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