Effects of microscopic disorder in electroabsorption spectroscopy: Orientational disorder in the fullerene crystal

2003 ◽  
Vol 118 (8) ◽  
pp. 3711-3716 ◽  
Author(s):  
Andrzej Eilmes ◽  
Piotr Petelenz
1993 ◽  
Author(s):  
Constantina Poga ◽  
Mark G. Kuzyk ◽  
Sergio Martinez ◽  
Carl W. Dirk

Author(s):  
Anatoly A. Udovenko ◽  
Alexander A. Karabtsov ◽  
Natalia M. Laptash

A classical elpasolite-type structure is considered with respect to dynamically disordered ammonium fluoro-(oxofluoro-)metallates. Single-crystal X-ray diffraction data from high quality (NH4)3HfF7 and (NH4)3Ti(O2)F5 samples enabled the refinement of the ligand and cationic positions in the cubic Fm \bar 3 m (Z = 4) structure. Electron-density atomic profiles show that the ligand atoms are distributed in a mixed (split) position instead of 24e. One of the ammonium groups is disordered near 8c so that its central atom (N1) forms a tetrahedron with vertexes in 32f. However, a center of another group (N2) remains in the 4b site, whereas its H atoms (H2) occupy the 96k positions instead of 24e and, together with the H3 atom in the 32f position, they form eight spatial orientations of the ammonium group. It is a common feature of all ammonium fluoroelpasolites with orientational disorder of structural units of a dynamic nature.


1995 ◽  
Vol 102 (17) ◽  
pp. 6941-6945 ◽  
Author(s):  
Gamini Dharmasena ◽  
Roger Frech

2000 ◽  
Vol 61 (16) ◽  
pp. 10972-10977 ◽  
Author(s):  
J. Oiknine-Schlesinger ◽  
M. Gerling ◽  
D. Gershoni ◽  
E. Ehrenfreund ◽  
D. Ritter

2000 ◽  
Vol 73 (9) ◽  
pp. 2157-2158 ◽  
Author(s):  
Keiji Wakita ◽  
Norihiro Tokitoh ◽  
Renji Okazaki
Keyword(s):  

2021 ◽  
Author(s):  
Katsuya Tanaka ◽  
Aso Rahimzadegan ◽  
Dennis Arslan ◽  
Stefan Fasold ◽  
Michael Steinert ◽  
...  

1987 ◽  
Vol 48 (9) ◽  
pp. 1513-1519 ◽  
Author(s):  
Ph. Depondt ◽  
M. Debeau

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