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Oleg I. Siidra, Sergey V. Krivovichev, Stanislav K. Filatov

Minerals and synthetic Pb(II) compounds with oxocentered tetrahedra: review and classification

Keywords: Lead compounds, Tetrahedral-based structures, Oxocentered tetrahedral, Lone electron pair stereoactivity, Minerals

The crystal structures of minerals and inorganic compounds with OPb₄ oxocentered tetrahedra are reviewed. It is shown that the OPb₄ tetrahedral units may link by sharing common Pb atoms to form structural units of various shape and dimensionality. These units determine basic topology of the structures and influence their stability and properties. The high strength of the OPb₄ te trahedral units involves interplay between high basicity of additional O^2– anions and stereochemical activity of the 6s² lone electron pairs on Pb²⁺ cations. The structural chemistry of polycations based upon OPb₄ tetrahedra, in general, follows major trends previously observed for cation-centered tetrahedral units (silicates, phosphates, metal sulphides with MS₄ tetrahedra, etc.). One may conclude that the basic structural correlations depend upon size and charge parameters of the ions only, irrespective of their positive or negative sign.

Zeitschrift für Kristallographie, Oldenbourg Wissenschaftsverlag

Print ISSN: 0044-2968
Volume: 223, 01/2008
Pages: 114 - 125

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