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- W2314582712 abstract "Conventionally, the core electron density (ED) of atoms in molecules is considered to be virtually unperturbed by chemical bonding effects. Here we report a combined experimental and theoretical investigation of the ED of cubic boron nitride including a detailed modeling of the core ED. By modeling structure factors obtained from very-high-resolution synchrotron powder X-ray diffraction data, it is possible to model not only the valence ED but also the response of the core ED to the effects of chemical bonding. The biggest challenge when studying the core ED is the deconvolution of the thermal motion from the experimental structure factors, since the thermal motion is strongly correlated to core ED deformation. However, atomic displacement parameters could be estimated from a full pattern Rietveld-multipolar refinement, and they are shown to be in good correspondence with ab initio lattice dynamics calculations. The corresponding extended multipole model including both core and valence ED refinement suggests that 2.0 electrons are transferred from the boron atomic basin to the nitrogen atomic basin. The core density was found to deplete upon bonding, which is in line with a significant charge transfer." @default.
- W2314582712 created "2016-06-24" @default.
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- W2314582712 date "2015-03-10" @default.
- W2314582712 modified "2023-09-27" @default.
- W2314582712 title "Powder X-ray Diffraction Electron Density of Cubic Boron Nitride" @default.
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- W2314582712 doi "https://doi.org/10.1021/jp511985d" @default.
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