Synthesis and crystal structure of a new oxohalide CdPb(2)O(2)Cl(2)

Siidra, O. I., Krivovichev, S. V., Teske, C. and Depmeier, W. (2009) Synthesis and crystal structure of a new oxohalide CdPb(2)O(2)Cl(2) Glass Physics and Chemistry, 35 (4). pp. 411-415. DOI 10.1134/s1087659609040105.

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A new compound, CdPb(2)O(2)Cl(2), is synthesized by the method of solid-phase reactions. The compound has monoclinic symmetry, space group C2/m, a = 12.392(8) , b = 3.8040(14) , c = 7.658(5) , beta = 122.64(5)A degrees, and V = 304.0(3) (3). The structure contains one symmetrically independent position of the Pb(2+) cation coordinated by three O(2-) anions (Pb(2+)-O(2-) = 2.29-2.34 ) and five Cl(-) anions (Pb(2+)-Cl(-) = 3.35-3.57 ). The Cd(2+) cation has a symmetric coordination with the formation of two bonds Cd-O = 2.15 and four bonds Cd-Cl = 2.73 . The oxygen atom is tetrahedrally coordinated by three Pb(2+) cations and one Cd(2+) cation, which leads to the formation of oxo-centered heterometallic OPb(3)Cd tetrahedra. The tetrahedra are linked together into chains through common Pb atoms and into layered complexes due to sharing of the equatorial Cd atoms. The chlorine atoms are located above the cavities of the oxo-centered layer.

Document Type: Article
Keywords: bond-valence parameters electric-conductivity lead glasses system oxide br cl pbo-pbcl2-cdcl2 chemistry
Research affiliation: Kiel University
DOI etc.: 10.1134/s1087659609040105
ISSN: 1087-6596
Date Deposited: 22 Dec 2011 05:36
Last Modified: 08 Oct 2012 10:10

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