Synthesis and characterization of PbBaGeO₄

Abstract

PbBaGeO 4 was prepared by high-temperature solid-state synthesis at 900 °C in a platinum crucible from lead(II) oxide, barium carbonate, and germanium(IV) oxide. This compound crystallizes with the BaNdGaO 4 structure type in the orthorhombic space group P2 1 2 1 2 1 (no. 19). The structure was refined from single-crystal X-ray diffraction data: a = 1021.6(2), b = 763.4(2), c = 618.1(2) pm, V = 482.1(2) Å 3 , and residuals of R 1 = 0.0373 and wR 2 = 0.0730 for all data. Next to structural data, Raman spectroscopic data of PbBaGeO 4 are reported.

Pb5(GeO4)(Ge2O7) and Pb3.32Ca1.68(GeO4)(Ge2O7): Two Nonlinear Optical Germanates Induced by Diverse PbOx Polyhedra

“…According to the above analysis, it can be found that Ge atoms can exhibit diverse coordination modes (GeO 4 , GeO 5 , and GeO 6 ) and then form abundant Ge–O polyanions. Additionally, some Pb-containing germanates including PbBaGeO 4 , Pb 3 Ga 2 Ge 4 O 14 , and Pb 3 (Pb 20 O 10 )­(GeO 4 ) 4 Cl 10 have also been studied.…”

“…According to the above analysis, it can be found that Ge atoms can exhibit diverse coordination modes (GeO 4 , GeO 5 , and GeO 6 ) and then form abundant Ge−O polyanions. Additionally, some Pb-containing germanates including PbBaGeO 4 , 40 Pb 3 Ga 2 Ge 4 O 14 , 6a and Pb 3 (Pb 20 O 10 )(GeO 4 ) 4 Cl 10 38 have also been studied. We have tried to synthesize Pb 5−x Ca x (GeO 4 )(Ge 2 O 7 ) with different x values through similar synthetic reactions and different reagent ratios.…”