Hydrogen-induced phase decomposition of Ba7Al13 and the crystal structure of Ba2AlH7

Q. A. Zhang; Y. Nakamura; K. Oikawa; T. Kamiyama; E. Akiba

doi:10.1016/S0925-8388(03)00420-1

Hydrogen-induced phase decomposition of Ba₇Al₁₃ and the crystal structure of Ba₂AlH₇

Q. A. Zhang, Y. Nakamura, K. Oikawa, T. Kamiyama, E. Akiba

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

22 Citations (Scopus)

Abstract

The hydrogenation characteristics of Ba₇Al₁₃ have been studied under a hydrogen pressure of 7 MPa at different temperatures for 5 days. Ba₇Al₁₃ reacts with hydrogen to form BaAlH ₅ and Al between 373 and 553 K. When the temperature is in the range from 553 to 603 K, Ba₇Al₁₃ is hydrogenated to Ba ₂AlH₇ and Al. However, further increasing the temperature leads to the hydrogen-induced decomposition of Ba₇Al₁₃ into Ba₂AlH₇ and BaAl₄. The crystal structure of Ba₂AlD₇ was also studied by neutron powder diffraction. Ba₂AlD₇ is isostructural to Sr₂AlD ₇, crystallizing with a monoclinic structure in space group I2/a. The lattice parameters were determined as a=13.197(3) Å, b=10.237(2) Å, c=8.509(2) Å, β=101.290(9)°.

Original language	English
Pages (from-to)	180-186
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	361
Issue number	1-2
DOIs	https://doi.org/10.1016/S0925-8388(03)00420-1
Publication status	Published - Oct 27 2003
Externally published	Yes

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/S0925-8388(03)00420-1

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@article{e61a7c2260854c70b6396b9b8a4ef773,

title = "Hydrogen-induced phase decomposition of Ba7Al13 and the crystal structure of Ba2AlH7",

abstract = "The hydrogenation characteristics of Ba7Al13 have been studied under a hydrogen pressure of 7 MPa at different temperatures for 5 days. Ba7Al13 reacts with hydrogen to form BaAlH 5 and Al between 373 and 553 K. When the temperature is in the range from 553 to 603 K, Ba7Al13 is hydrogenated to Ba 2AlH7 and Al. However, further increasing the temperature leads to the hydrogen-induced decomposition of Ba7Al13 into Ba2AlH7 and BaAl4. The crystal structure of Ba2AlD7 was also studied by neutron powder diffraction. Ba2AlD7 is isostructural to Sr2AlD 7, crystallizing with a monoclinic structure in space group I2/a. The lattice parameters were determined as a=13.197(3) {\AA}, b=10.237(2) {\AA}, c=8.509(2) {\AA}, β=101.290(9)°.",

author = "Zhang, {Q. A.} and Y. Nakamura and K. Oikawa and T. Kamiyama and E. Akiba",

note = "Funding Information: This work was carried out as part of the {\textquoteleft}WE-NET{\textquoteright} project. Q.A. Zhang would like to thank the New Energy and Industrial Technology Department Organization (NEDO) of Japan for providing the NEDO fellowship.",

year = "2003",

month = oct,

day = "27",

doi = "10.1016/S0925-8388(03)00420-1",

language = "English",

volume = "361",

pages = "180--186",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier BV",

number = "1-2",

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TY - JOUR

T1 - Hydrogen-induced phase decomposition of Ba7Al13 and the crystal structure of Ba2AlH7

AU - Zhang, Q. A.

AU - Nakamura, Y.

AU - Oikawa, K.

AU - Kamiyama, T.

AU - Akiba, E.

N1 - Funding Information: This work was carried out as part of the ‘WE-NET’ project. Q.A. Zhang would like to thank the New Energy and Industrial Technology Department Organization (NEDO) of Japan for providing the NEDO fellowship.

PY - 2003/10/27

Y1 - 2003/10/27

N2 - The hydrogenation characteristics of Ba7Al13 have been studied under a hydrogen pressure of 7 MPa at different temperatures for 5 days. Ba7Al13 reacts with hydrogen to form BaAlH 5 and Al between 373 and 553 K. When the temperature is in the range from 553 to 603 K, Ba7Al13 is hydrogenated to Ba 2AlH7 and Al. However, further increasing the temperature leads to the hydrogen-induced decomposition of Ba7Al13 into Ba2AlH7 and BaAl4. The crystal structure of Ba2AlD7 was also studied by neutron powder diffraction. Ba2AlD7 is isostructural to Sr2AlD 7, crystallizing with a monoclinic structure in space group I2/a. The lattice parameters were determined as a=13.197(3) Å, b=10.237(2) Å, c=8.509(2) Å, β=101.290(9)°.

AB - The hydrogenation characteristics of Ba7Al13 have been studied under a hydrogen pressure of 7 MPa at different temperatures for 5 days. Ba7Al13 reacts with hydrogen to form BaAlH 5 and Al between 373 and 553 K. When the temperature is in the range from 553 to 603 K, Ba7Al13 is hydrogenated to Ba 2AlH7 and Al. However, further increasing the temperature leads to the hydrogen-induced decomposition of Ba7Al13 into Ba2AlH7 and BaAl4. The crystal structure of Ba2AlD7 was also studied by neutron powder diffraction. Ba2AlD7 is isostructural to Sr2AlD 7, crystallizing with a monoclinic structure in space group I2/a. The lattice parameters were determined as a=13.197(3) Å, b=10.237(2) Å, c=8.509(2) Å, β=101.290(9)°.

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U2 - 10.1016/S0925-8388(03)00420-1

DO - 10.1016/S0925-8388(03)00420-1

M3 - Article

AN - SCOPUS:0141957051

SN - 0925-8388

VL - 361

SP - 180

EP - 186

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

ER -

Hydrogen-induced phase decomposition of Ba₇Al₁₃ and the crystal structure of Ba₂AlH₇

Abstract

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