ChemInform Abstract: Synthesis and Characterization of the New Lead Strontium Germanate PbSrGeO₄.

Abstract

Synthesis and Characterization of the New Lead Strontium GermanatePbSrGeO 4. -PbSrGeO4 is prepared by a high-temperature reaction of stoichiometric amounts of PbO, SrCO 3, and GeO2 (platinum crucible, 900 C, 130 h). The compound crystallizes in the orthorhombic space group P212121 (Z = 4, single crystal XRD) and is isotypic to BaNdGaO 4. The structure contains isolated [GeO4] 4tetrahedra. A circular arrangement of six GeO 4 tetrahedra leads to large channels hosting Sr in eightfold coordination. Pb is coordinated by three O atoms that form together with the lone pair a pseudo-tetrahedral coordination sphere. The compound is further characterized by Raman spectroscopy and DFT calculations. -(PETSCHNIG, L. L.; WURST, K.; PERFLER, L.; JOHRENDT, D.; HUPPERTZ*, H.; Z. Naturforsch., B: Chem. Sci. 69b (2014) 8, 845-850, http://dx.doi.org/10.5560/ZNB.2014-4125 ; Inst. Allg. Anorg. Theor. Chem., Leopold-Franzens-Univ., A-6020 Innsbruck, Austria; Eng.) -J. Schramke 47-003