The alkaline earth-palladium-germanides Sr₃Pd₄Ge₄ and BaPdGe

Abstract

The germanides Sr3Pd4Ge4and BaPdGe were obtained from high-temperature reactions in sealed niobium ampoules and their structures have been determined from single-crystal X-ray diffraction data:a=444.2(1),b=438.1(1),c=2472.2(7) pm, space groupImmm, U3Ni4Si4type,wR2=0.0471, 576 unique reflections, 25 parameters for Sr3Pd4Ge4anda=677.09(8), space groupP213, LaIrSi type,wR2=0.0322, 409 unique reflections, nine parameters for BaPdGe. Both germanides have pronounced three-dimensional [Pd4Ge4]δ−and [PdGe]δ−polyanionic networks with Pd–Ge bonding interactions. This is confirmed by the density functional theory (DFT)-based electronic structure investigations, the trends of charge transfer and crystal orbital overlap population (COOP) analyses.

A review of the antimicrobial benefits of naturally extracted nanomaterials

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