Synthesis and crystal structure of Pb{sub 3}[IO{sub 3}]{sub 2}Cl{sub 4}, a representative of a new iodate-chloride class of compounds
- Moscow State University, Faculty of Geology (Russian Federation)
Compound Pb{sub 3}[IO{sub 3}]{sub 2}Cl{sub 4} (space group C12/c1), representing a new iodate-chloride class of compounds, is synthesized under hydrothermal conditions. Only two minerals, schwartzembergite Pb{sub 3}[IO{sub 3}]Cl{sub 2}O(OH) and seeligerite Pb{sub 3}[IO{sub 3}]Cl{sub 3}O, the structures of which are unknown, are close in composition to this compound. In the iodate-chloride studied, the pentavalent iodine atom has an umbrella-like coordination, which is typical of iodates and consists of three O atoms at short distances and the fourth O atom at a longer distance. [IO{sub 4}]{sup 3-} tetrahedra share edges to form pairs. Lead ions form layers parallel to the ab plane. Along the c axis, these layers alternate with layers of iodate groups. Pb atoms are coordinated by O atoms of iodate groups and Cl atoms. The coordination sphere of the Pb(1) atom contains a free sector which is directed to more distant halogen atoms and possibly accommodates the lone electron pair.
- OSTI ID:
- 22051247
- Journal Information:
- Crystallography Reports, Vol. 55, Issue 1; Other Information: Copyright (c) 2010 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7745
- Country of Publication:
- United States
- Language:
- English
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