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- W2318128099 abstract "Two new ytterbium germanides, Yb3Ge5 and YbGe3, were obtained using high-pressure and high-temperature reactions. Yb3Ge5 crystallizes in the Pu3Pd5 structure (the space group Cmcm, No. 63) with a = 9.3739(8) Ǻ, b = 7.5569(5) Ǻ, c = 9.5170(8) Ǻ, and V = 674.16(9) Ǻ3. It is a new polymorph and contains Ge5 units with a square-pyramidal structure. COHP and ELF calculations revealed that the unit is constructed with strong Ge–Ge covalent bonds. The XAS analysis showed that the mean oxidation state of Yb is +2.4. It is metallic and is an example of electron-rich Zintl phases. YbGe3 crystallizes in the Cu3Au structure (the space group Pm3̅m, No. 221) having a unit cell of a = 4.276(1) Ǻ and V = 78.13(3) Ǻ3. It is the first example for heavy rare-earth germanides having the Cu3Au-type structure. The mean oxidation state of Yb is +2.4. YbGe3 is metallic and is possibly a valence-fluctuating system." @default.
- W2318128099 created "2016-06-24" @default.
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- W2318128099 date "2011-10-25" @default.
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- W2318128099 title "Structure and Chemical Bonding of Binary Ytterbium Germanides, Yb<sub>3</sub>Ge<sub>5</sub> and YbGe<sub>3</sub>, Prepared by High-Pressure and High-Temperature Reactions" @default.
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- W2318128099 doi "https://doi.org/10.1021/jp206207c" @default.
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