Anomalous hyperfine interactions in FeOCl intercalation compounds: The van der Waals layer lattice modes

1980 ◽  
Vol 73 (12) ◽  
pp. 6345-6346 ◽  
Author(s):  
R. H. Herber ◽  
Alan J. Rein
Keyword(s):  
Hyperfine Interactions ◽  
Van Der Waals ◽  
Intercalation Compounds ◽  
Lattice Modes

Chemical bond in FexTiSe2 intercalation compounds: dramatic influence of Fe concentration

RSC Advances ◽  
2016 ◽  
Vol 6 (108) ◽  
pp. 106527-106539 ◽  
Author(s):  
Alexey S. Shkvarin ◽  
Yury M. Yarmoshenko ◽  
Alexander I. Merentsov ◽  
Elena G. Shkvarina ◽  
Evgeny A. Suslov ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Chemical Bond ◽  
Van Der Waals ◽  
Intercalation Compounds ◽  
Chemical Bonds ◽  
First Time

iThe changes in the electronic structure and nature of the chemical bonds due to the ordering of the intercalated atoms inside the van der Waals gap were observed for the first time.

Approaches to the Study of van der Waals Interactions in Solids

1993 ◽  
Vol 48 (3) ◽  
pp. 471-477
Author(s):  
Alarich Weiss
Keyword(s):  
Hyperfine Interactions ◽  
Van Der Waals ◽  
Elementary Cell ◽  
Intramolecular Interactions ◽  
Van Der Waals Interactions ◽  
Molecular Solids ◽  
Crystal Fields ◽  
Solid States ◽  
The Individual ◽  
Intermolecular Distances

Abstract Van der Waals forces are of short range. In molecular crystals the interacting atoms or groups of atoms of a molecule are fixed in their position with respect to the atoms of the neighboring molecules. From measurements of the intermolecular interactions via properties which can be assigned to the individual atoms (groups), such as hyperfine interactions or vibrational frequencies, as a function of the intermolecular distances, the van der Waals (vdW) potentials may be evaluated. We propose the use of discrete changes of intermolecular distances for studying vdW-interactions, the method of “Several Solid States”, a) by combining a molecule A with different moleculs Bi, in stoichiometric proportions and in a crystallographically ordered way to molecular solid complexes; b) by investigating the changes of atomic (group) properties in systems with two ore more solid phases appearing in the phase diagram as a function of temperature (pressure). This way of using several solid states is offered only by chance; c) by using the fact that in many molecular solids there is more than one molecule in the asymmetric unit of the elementary cell in the crystal structure, and therefore several vdW-potentials for chemically identical intermolecular neighbors; d) by the synthesis of compounds containing the atoms (groups), the vdW-interactions of which one wants to study, with one or more centers of chirality. With one center of asymmetry in the molecule one finds the molecule considered in two different situations of vdW-contacts at least, and, in first approximation, one can assume identical intramolecular interactions (besides the optical activity). Two chirality centers within the molecule lead to three (at least) different crystal fields: a) (±); b) (− −) respectively (+ +); c) (− −, + +). Examples of hyperfine interaction studies, based on this "Several Solid States" concept are discussed.

Structure determination of LixTiS2 by neutron diffraction

1980 ◽  
Vol 58 (2) ◽  
pp. 207-213 ◽  
Author(s):  
J. R. Dahn ◽  
W. R. McKinnon ◽  
R. R. Haering ◽  
W. J. L. Buyers ◽  
B. M. Powell
Keyword(s):  
Neutron Diffraction ◽  
Crystal Structures ◽  
Structure Determination ◽  
Van Der Waals ◽  
Three Dimensional ◽  
Intercalation Compounds ◽  
Octahedral Sites

The crystal structures of the intercalation compounds of LixTiS2 are investigated by neutron diffraction for x = 0.12, 0.33, 0.67, and 1.0. The Li atoms are shown to preferentially occupy the octahedral sites in the van der Waals gaps of the host TiS2 lattice for all values of x and no evidence for three-dimensional Li ordering is observed.

Low frequency longitudinal lattice modes in graphite intercalation compounds

1981 ◽  
Vol 40 (3) ◽  
pp. 229-232 ◽  
Author(s):  
G. Dresselhaus ◽  
R. Al-Jishi ◽  
J.D. Axe ◽  
C.F. Majkrzak ◽  
L. Passell ◽  
...  
Keyword(s):  
Low Frequency ◽  
Intercalation Compounds ◽  
Graphite Intercalation Compounds ◽  
Graphite Intercalation ◽  
Lattice Modes
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