NDLI: The R$_{2}$Pd$_{3}$Ge$_{5}$ (R = La–Nd, Sm) germanides: synthesis, crystal structure and symmetry reduction

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The R$_{2}$Pd$_{3}$Ge$_{5}$ (R = La–Nd, Sm) germanides: synthesis, crystal structure and symmetry reduction

Content Provider	Springer Nature Link
Author	Solokha, Pavlo Freccero, Riccardo Negri, Serena Proserpio, Davide M. Saccone, Adriana
Copyright Year	2016
Abstract	Direct synthesis and structural characterization of a series of polar rare earth palladium germanides of R$_{2}$Pd$_{3}$Ge$_{5}$ composition (R = La–Nd, Sm) is reported. The crystal structure of the Nd representative was determined by single-crystal X-ray diffraction analysis (U$_{2}$Co$_{3}$Si$_{5}$-type, SG: Ibam, oI40, Z = 4, a = 10.1410(6), b = 12.0542(8), c = 6.1318(4) Å, wR $_{2}$ = 0.0306, 669 F $^{2}$ values, 31 variables). The crystal structures of the other homologues were ensured by powder X-ray diffraction pattern analysis. A smooth variation of the cell dimensions is observed through the rare earth series. The structure of the studied compounds can be interpreted as consisting of a complex three-dimensional [Pd$_{3}$Ge$_{5}$]$^{δ−}$ network spaced by the rare earth cations. Within the concept of symmetry reduction, a Bärnighausen tree is used to rationalize the related crystal structures of the RPd$_{2}$Ge$_{2}$, RPdGe$_{3}$ and R$_{2}$Pd$_{3}$Ge$_{5}$ ternary compounds, enriching the large family of the BaAl$_{4}$ derivatives. Moreover, syntheses with metal fluxes were performed, some of which were successful to obtain large crystals of La$_{2}$Pd$_{3}$Ge$_{5}$ (using Bi as solvent) and Nd$_{2}$Pd$_{3}$Ge$_{5}$ (using Pb as solvent) stoichiometry.
Starting Page	1693
Ending Page	1701
Page Count	9
File Format	PDF
ISSN	10400400
Journal	Structural Chemistry
Volume Number	27
Issue Number	6
e-ISSN	15729001
Language	English
Publisher	Springer US
Publisher Date	2016-08-10
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Polar intermetallics Germanides Crystal structure Single-crystal X-ray diffraction Flux synthesis Computer Applications in Chemistry Physical Chemistry Theoretical and Computational Chemistry
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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