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- W2014351680 abstract "The effect of valence electron concentration (VEC) and size of the $X$ element in $X{text{MgB}}_{14}$ (space group $Imma$ $X=text{Al}$, C, Si, Ge, Mg, Sc, Ti, V, Zr, Hf, Nb, Ta) on stability and elastic properties was studied using ab initio calculations. Generally, icosahedral bonds, present in these compounds, are electron deficient. Based on the Bader charge analysis [Bader, Atoms in Molecules: A Quantum Theory (Oxford University Press, New York, 1990)] and density of states, $X$ elements and Mg are shown here to transfer electrons to the boron network. Hence, the stability of the compounds studied increases as more electrons are transferred. As the VEC of the $X$ element increases, fewer electrons are transferred to the boron network, and therefore the phase stability decreases. The bulk moduli of all compounds are in the range from 205 to 220 GPa. This can be understood analyzing the cohesive energy thereof. As the bulk modulus increases, the cohesive energy decreases." @default.
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- W2014351680 date "2008-08-28" @default.
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- W2014351680 title "Phase stability and elastic properties of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi>X</mml:mi><mml:msub><mml:mrow><mml:mtext>MgB</mml:mtext></mml:mrow><mml:mrow><mml:mn>14</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>studied by<i>ab initio</i>calculations<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:mi>X</mml:mi><mml:mo>=</mml:mo><mml:mtext>Al</mml:mtext><mml:…" @default.
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- W2014351680 doi "https://doi.org/10.1103/physrevb.78.054122" @default.
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