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- W2949964261 abstract "Abstract Yb4Mg4Fe3H22 and its deuteride were prepared by sintering mixtures of YbMg, Fe and LiH (LiD) powders in the ratio YbMg:Fe:LiH (LiD) = 4:3:1 at 510–520 °C and 120–155 bar hydrogen (deuterium) pressure, and were characterized by X-ray and neutron powder diffraction. They crystallize with cubic symmetry (space group, P4/mmm; hydride, a = 6.6936(4) A ; deuteride, a = 6.6839(5) A , and are isostructural with the calcium analogue Ca4Mg4Fe3H22. The deuteride contains octahedral [FeD6]4− complex anions with bond distances [ Fe -4 D 1] = 1.586(5) A and [ Fe -2 D 2] = 1.554(7) A and tetrahedrally coordinated D− anions with bond distances [ D 3- Mg ] = 1.915(9) A and [ D 3-3 Yb ] = 2.411(7) A . At a hydrogen pressure of 6 bar, the Yb compound decomposes at about 480 °C into YbH2, Mg and Fe, whereas the Ca analogue decomposes at about 450 °C into Ca2FeH6, Mg and Fe. The enthalpies of desorption, as measured from pressure-composition isotherms, are 137(3) kJ (mol H2)−1 for Yb4Mg4Fe3H22 and 122(4) kJ (mol H2)− for Ca4Mg4Fe3H22." @default.
- W2949964261 created "2019-06-27" @default.
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- W2949964261 date "2010-08-31" @default.
- W2949964261 modified "2023-09-27" @default.
- W2949964261 title "ChemInform Abstract: Synthesis, Structure and Thermal Stability of Yb4Mg4Fe3H22." @default.
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- W2949964261 doi "https://doi.org/10.1002/chin.199335035" @default.
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