TY - JOUR
T1 - High-pressure synthesis of hydrides of Ca-TM systems (TM = Mn, Fe, Co and Ni)
AU - Kakuta, H.
AU - Miyashita, T.
AU - Goto, Y.
AU - Kamegawa, A.
AU - Takamura, H.
AU - Okada, M.
PY - 2001
Y1 - 2001
N2 - New hydrides of Ca-TM-H systems (TM = Mn, Fe, Co and Ni) have been explored by using a high-pressure technique. The high-pressure of up to 5 GPa was yielded by cubic-anvil-type apparatus. All the samples of Ca-TM-H systems (TM = Mn, Fe and Co) prepared at 1073 K under 5 GPa were found to be mixtures of the raw materials. However, for the Ca-Ni-H system, a new hydride with a chemical composition of CaH2-33 at%Ni was prepared at 1223 K under 5 GPa. The color of the hydride was reddish brown. As an additional hydrogen source was used during the synthesis, the color changed into black. The new hydride prepared with additional hydrogen was found to have the CsCl-type structure. The lattice parameter was a = 0.35542(2) nm.
AB - New hydrides of Ca-TM-H systems (TM = Mn, Fe, Co and Ni) have been explored by using a high-pressure technique. The high-pressure of up to 5 GPa was yielded by cubic-anvil-type apparatus. All the samples of Ca-TM-H systems (TM = Mn, Fe and Co) prepared at 1073 K under 5 GPa were found to be mixtures of the raw materials. However, for the Ca-Ni-H system, a new hydride with a chemical composition of CaH2-33 at%Ni was prepared at 1223 K under 5 GPa. The color of the hydride was reddish brown. As an additional hydrogen source was used during the synthesis, the color changed into black. The new hydride prepared with additional hydrogen was found to have the CsCl-type structure. The lattice parameter was a = 0.35542(2) nm.
KW - Anvil-type apparatus
KW - Calcium-transition metal-hydrogen systems
KW - CsCl-type structure
KW - X-ray diffraction
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U2 - 10.2320/matertrans.42.443
DO - 10.2320/matertrans.42.443
M3 - Article
AN - SCOPUS:0034981144
SN - 1345-9678
VL - 42
SP - 443
EP - 445
JO - Materials Transactions
JF - Materials Transactions
IS - 3
ER -