TY - JOUR
T1 - Crystal structure of novel hydrides in a Mg-Ni-H system prepared under an ultra high pressure
AU - Takamura, H.
AU - Kakuta, H.
AU - Kamegawa, A.
AU - Okada, M.
N1 - Funding Information:
This work has been supported in part by Grant-in-Aids for Scientific Research on the Priority Group of New Protium Function and on the Priority Group of Platform Science and Technology for Advanced Magnesium Alloys from the Ministry of Culture, Science, and Education. The authors thank Dr Fukai for his helpful suggestions to experimental setup for high pressure synthesis.
PY - 2002/1/17
Y1 - 2002/1/17
N2 - The crystal structure of novel hydrides in the Mg-Ni-H system has been studied using a powder X-ray diffraction and transmission electron microscopy. A cubic-anvil-type apparatus was utilized to prepare samples. The new hydride with a chemical composition of around MgH 2-60 at% Ni was synthesized at 1073 K for 2 h under a pressure as high as 5 GPa. From TGA analysis, the new hydride was found to be Mg 2Ni 3H 3.4. Orthorhombic and monoclinic crystal systems with a primitive cell were proposed as possible symmetries of the new hydride. X-ray and electron diffraction patterns of the new hydride were indexed in an orthorhombic structure with a□ 0.8859(4), b□ 1.3740(5), c□ 0.4694(2) nm. Moreover, decomposition of the hydride into Mg 2Ni was observed by the transmission electron microscopy.
AB - The crystal structure of novel hydrides in the Mg-Ni-H system has been studied using a powder X-ray diffraction and transmission electron microscopy. A cubic-anvil-type apparatus was utilized to prepare samples. The new hydride with a chemical composition of around MgH 2-60 at% Ni was synthesized at 1073 K for 2 h under a pressure as high as 5 GPa. From TGA analysis, the new hydride was found to be Mg 2Ni 3H 3.4. Orthorhombic and monoclinic crystal systems with a primitive cell were proposed as possible symmetries of the new hydride. X-ray and electron diffraction patterns of the new hydride were indexed in an orthorhombic structure with a□ 0.8859(4), b□ 1.3740(5), c□ 0.4694(2) nm. Moreover, decomposition of the hydride into Mg 2Ni was observed by the transmission electron microscopy.
KW - Crystal structure
KW - Hydride
KW - Magnesium-nickel-hydrogen system
KW - TEM
KW - XRD
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U2 - 10.1016/S0925-8388(01)01577-8
DO - 10.1016/S0925-8388(01)01577-8
M3 - Conference article
AN - SCOPUS:0037122572
SN - 0925-8388
VL - 330-332
SP - 157
EP - 161
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
T2 - Proceedings of the International Symposium on Metal-Hydrogen (MH 2000)
Y2 - 1 October 2000 through 6 October 2000
ER -