Polycationic disorder in [Bi{sub 6}O{sub 4}(OH){sub 4}](NO{sub 3}){sub 6}: Structure determination using synchrotron radiation and microcrystal X-ray diffraction
- UCCS, Equipe de Chimie du Solide, UMR CNRS 8181, ENSC Lille-UST Lille, BP 90108, 59652 Villeneuve d'Ascq Cedex (France)
- CCLRC Daresbury Laboratory, Warrington WA4 4AD, Cheshire (United Kingdom)
The bismuth basic nitrate [Bi{sub 6}O{sub 4}(OH){sub 4}](NO{sub 3}){sub 6} crystallizes in a rhombohedral hexagonal unit cell with parameters a=15.1332(6)A, c=15.7909(9)A, V=3131.8(3)A{sup 3}, Z=6, space group R-3. The synthesis, formula determination, thermogravimetric analysis and nitrate assay, and finally, its crystal structure refinement determined at 150(2)K by synchrotron X-ray microcrystal diffraction are reported. Its structure is built from [Bi{sub 6}O{sub 4}(OH){sub 4}]{sup 6+} polycations, six per unit cell, disordered over two positions. Two oxygen atoms are common to the two antagonist polycations (full occupancy) while the remaining six are partially occupied. The [Bi{sub 6}O{sub 4}(OH){sub 4}]{sup 6+} hexanuclear clusters form columns along the c-axis. The cohesion between polycationic entities is effected by nitrate anions through either OH-ONO{sub 2} hydrogen bonds or Bi-ONO{sub 2} bonds. One of the two independent [NO{sub 3}]{sup -} groups is also disordered over two positions. Only a local order in the columns is obtained by formation of pairs of ordered [Bi{sub 6}O{sub 4}(OH){sub 4}]{sup 6+} polycations.
- OSTI ID:
- 20900851
- Journal Information:
- Journal of Solid State Chemistry, Vol. 179, Issue 10; Other Information: DOI: 10.1016/j.jssc.2006.05.043; PII: S0022-4596(06)00322-7; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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