Novel RMn2 (R = Y, Er) hydrides with laves phase synthesized under hydrogen pressure

R. S. Liu; S. M. Filipek; V. Paul-Boncour; S. F. Hu; G. Andre; F. Bouree; H. D. Yang; R. Wierzbicki

doi:10.1143/jpsjs.76sa.5

Novel RMn₂ (R = Y, Er) hydrides with laves phase synthesized under hydrogen pressure

R. S. Liu, S. M. Filipek, V. Paul-Boncour, S. F. Hu, G. Andre, F. Bouree, H. D. Yang, R. Wierzbicki

Department of Physics

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

Abstract

A novel hydride YMn₂H₆ has been synthesized from C15 Laves YMn₂ under hydrogen pressure. According to neutron powder diffraction experiments, YMn₂H₆ crystallizes in the Fm-3m space group with a = 6.708 Ǻ at 300 K. Thus, the initial C15 structure is strongly rearranged to form a structure in which the Y atoms and half of the Mn atoms statistically occupy the 8c site, whereas the other Mn atoms located in the 4a site are surrounded by 6 H atoms (24e). According to our knowledge, this type of behaviour has never been observed in hydrides derived from Laves phase intermetallics. A corresponding investigation of the synthesis of ErMn2H6 under high hydrogen pressure has been conducted.

Original language	English
Pages (from-to)	5-6
Number of pages	2
Journal	Journal of the Physical Society of Japan
Volume	76
Issue number	SUPPL. A
DOIs	https://doi.org/10.1143/jpsjs.76sa.5
Publication status	Published - 2007

Keywords

C14
C15
ErMnH
Hydride
Hydrogen pressure
Laves phase
Neutron diffraction
YMnH

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1143/jpsjs.76sa.5

Cite this

@article{67b1e8983d3d436d9117d58af4f1971f,

title = "Novel RMn2 (R = Y, Er) hydrides with laves phase synthesized under hydrogen pressure",

abstract = "A novel hydride YMn2H6 has been synthesized from C15 Laves YMn2 under hydrogen pressure. According to neutron powder diffraction experiments, YMn2H6 crystallizes in the Fm-3m space group with a = 6.708 Ǻ at 300 K. Thus, the initial C15 structure is strongly rearranged to form a structure in which the Y atoms and half of the Mn atoms statistically occupy the 8c site, whereas the other Mn atoms located in the 4a site are surrounded by 6 H atoms (24e). According to our knowledge, this type of behaviour has never been observed in hydrides derived from Laves phase intermetallics. A corresponding investigation of the synthesis of ErMn2H6 under high hydrogen pressure has been conducted.",

keywords = "C14, C15, ErMnH, Hydride, Hydrogen pressure, Laves phase, Neutron diffraction, YMnH",

author = "Liu, {R. S.} and Filipek, {S. M.} and V. Paul-Boncour and Hu, {S. F.} and G. Andre and F. Bouree and Yang, {H. D.} and R. Wierzbicki",

year = "2007",

doi = "10.1143/jpsjs.76sa.5",

language = "English",

volume = "76",

pages = "5--6",

journal = "Journal of the Physical Society of Japan",

issn = "0031-9015",

publisher = "Physical Society of Japan",

number = "SUPPL. A",

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TY - JOUR

T1 - Novel RMn2 (R = Y, Er) hydrides with laves phase synthesized under hydrogen pressure

AU - Liu, R. S.

AU - Filipek, S. M.

AU - Paul-Boncour, V.

AU - Hu, S. F.

AU - Andre, G.

AU - Bouree, F.

AU - Yang, H. D.

AU - Wierzbicki, R.

PY - 2007

Y1 - 2007

N2 - A novel hydride YMn2H6 has been synthesized from C15 Laves YMn2 under hydrogen pressure. According to neutron powder diffraction experiments, YMn2H6 crystallizes in the Fm-3m space group with a = 6.708 Ǻ at 300 K. Thus, the initial C15 structure is strongly rearranged to form a structure in which the Y atoms and half of the Mn atoms statistically occupy the 8c site, whereas the other Mn atoms located in the 4a site are surrounded by 6 H atoms (24e). According to our knowledge, this type of behaviour has never been observed in hydrides derived from Laves phase intermetallics. A corresponding investigation of the synthesis of ErMn2H6 under high hydrogen pressure has been conducted.

AB - A novel hydride YMn2H6 has been synthesized from C15 Laves YMn2 under hydrogen pressure. According to neutron powder diffraction experiments, YMn2H6 crystallizes in the Fm-3m space group with a = 6.708 Ǻ at 300 K. Thus, the initial C15 structure is strongly rearranged to form a structure in which the Y atoms and half of the Mn atoms statistically occupy the 8c site, whereas the other Mn atoms located in the 4a site are surrounded by 6 H atoms (24e). According to our knowledge, this type of behaviour has never been observed in hydrides derived from Laves phase intermetallics. A corresponding investigation of the synthesis of ErMn2H6 under high hydrogen pressure has been conducted.

KW - C14

KW - C15

KW - ErMnH

KW - Hydride

KW - Hydrogen pressure

KW - Laves phase

KW - Neutron diffraction

KW - YMnH

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