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(2000)
The Rare Earth Trifluorides, Part 1: The High Temperature Chemistry of the Rare Earth Trifluorides
The Rare Earth Trifluorides B. P. Sobolev (2000)
Institut d’Estudis Catalans, Barcelona, 2000)
P. Coppens N. K. Hansen (1978)
10.1107/S0567739478001886Acta Crystallogr. A, 34
H. Schulz B. Maksimov (1985)
10.1107/S0108768185001677Acta Crystallogr. B, 41
V. G. Tsirel’son A. S. Avilov (2001)
10.1134/1.1387121Crystallogr. Rep., 46
R. P. Feynman (1939)
10.1103/PhysRev.56.340Phys. Rev., 56
(2001)
Tsirel'son
R. F. W. Bader Y. Tal (1980)
10.1103/PhysRevA.21.1Phys. Rev. A, 21
R. P. Ozerov (1996)
Electron Density and Bonding in Crystals: Theory and Diffraction Experiments in Solid State Physics and Chemistry
A. S. Avilov (1992)
Electron Diffraction Techniques
A. S. Avilov V. G. Tsirelson (2001)
10.1021/jp0015729J. Phys. Chem. B, 105
A. P. Dudka (2002)
10.1134/1.1446925Crystallogr. Rep., 47
(2018)
The Principles of Electricity Theory (Mir, Moscow, 1979)
A. M. Golubev N. I. Sorokin (2014)
10.1134/S1063774514010155Crystallogr. Rep., 59
P. Coppens Z. Su (1992)
10.1107/S0108767391009820Acta Crystallogr. A, 48
The Principles of Electricity Theory I. E. Tamm (1979)
I. E. Tamm, The Principles of Electricity Theory (Mir, Moscow, 1979).
R. Bader (1990)
Atoms in molecules : a quantum theory
D. H. Templeton A. Zalkin (1985)
10.1107/S0108768185001689Acta Crystallogr. B, 41
Abstract Thin-film samples of fluorides CaF2, BaF2, and LaF3, free of oxyfluorides, have been fabricated by ultrasonic fragmentation (CaF2) and sublimation in vacuum onto amorphous carbon substrates (BaF2 and LaF3). The electron diffraction patterns of these polycrystals are measured with a low statistical error (~1–2%) using an EMR-102 electron diffractometer. The reflection intensities were applied to refine the electronic structure; the refinement showed mainly ionic character of chemical bonding in these compounds. Electron density and electrostatic potential distributions were obtained using the parameters of kappa-model, which describes ionic bonding, and their quantitative analysis was performed within Bader’s topological approach. It is noted that the positions of “critical points” in the electrostatic potential and electron density maps for CaF2, BaF2, and LaF3 crystals do not exactly coincide. This finding has confirmed the well-known fact: the electron density (and energy) of a many-electron system is not completely determined by the innercrystalline electrostatic field. The electron density and electrostatic potential maps supplement each other when describing interatomic interactions. A consideration of the gradient field E(r) = –∇φ(r) in these crystals confirms the conclusion that long-range Coulomb interactions of atoms (having finite sizes) occur in the form of atom‒ atom interactions. The interaction forces and their directions in crystal is a peculiar property of each compound (specifically, each structure type).
Crystallography Reports – Springer Journals
Published: Nov 1, 2018
Keywords: Crystallography and Scattering Methods
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