Structural and physical properties of the new intermetallic compound Yb3Pd2Sn2

The crystal structure of the ternary intermetallic compound Yb3Pd2Sn2 has been determined ab initio from powder X-ray diffraction data. The compound crystallizes as a new structure type in the orthorhombic space group Pbcm and lattice constants a=0.58262(3), b=1.68393(8), c=1.38735(7) nm. Yb3Pd2Sn2 is composed of a complex ∞[Pd2Sn2]δ- polyanionic network in which the Yb ions are embedded. A comparison between this structure and those of Eu3Pd2Sn2 and Ca3Pd2Sn2, other novel polar intermetallic compounds, was made. DC susceptibility and 170Yb Moessbauer spectroscopic measurements indicate a close-to divalent Yb behavior. Moreover, a hybridization between 4f and conduction electrons is suggested by electronic structure calculations and heat capacity measurements. - Graphical Abstract: Polyanionic networks for Yb3Pd2Sn2 and Eu3Pd2Sn2. Highlights: → We determined ab initio the crystal structure of the novel ternary Yb3Pd2Sn2 stannide. → This structure has been compared with those of other polar 3:2:2 stannides discovered in this work. → Measurements of physical properties on Yb3Pd2Sn2 point to a close-to-divalent Yb ion. → Electron structure calculation and heat capacity indicate some hybridization between 4f and conduction electrons.