Covalent guest-framework interactions in heavy metal sodalites: Structure and properties of thallium and silver sodalite
- Univ. of California, Santa Barbara, CA (United States)
- Univ. of Aarhus (Denmark). Dept. of Chemistry
- Brookhaven National Lab., Upton, NY (United States). Dept. of Chemistry
Covalent bonds between the heavy metal cations and the aluminosilicate framework have been discovered to be the cause of distinct structural characteristics in anhydrous sodalites Ag{sub 6}[AlSiO{sub 4}]{sub 6} and Tl{sub 6}[AlSiO{sub 4}]{sub 6} that differ significantly from their alkali metal containing analogues. Evidence of guest-framework bonding interactions include interatomic distances, shifted IR bands, and quadrupole coupling of aluminum. This bonding results in a reduction of the unit cell size, and a locked in static disorder of the cations. Also of interest are the short Tl-Tl distances seen in Tl{sub 6}[AlSiO{sub 4}]{sub 6}. These could indicate the formation of Tl{sub 3}{sup 3+} species in each cage, resulting in a bcc lattice of ionic thallium clusters. Low-temperature synchrotron powder diffraction data, multiple quantum magic-angle spinning (MQ-MAS) NMR, and FTIR studies are presented.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- Office of Naval Research, Washington, DC (United States); National Science Foundation, Washington, DC (United States); USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 696646
- Journal Information:
- Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical, Vol. 103, Issue 34; Other Information: PBD: 26 Aug 1999
- Country of Publication:
- United States
- Language:
- English
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