The mixed anion skutterudite IrSn1.5Te1.5 has been synthesized and characterized by X-ray powder diffraction, thermopower and electrical resistivity measurements. Structural analysis reveals that Sn and Te order in layers perpendicular to the  direction of the skutterudite unit cell, and a distortion of the anion sublattice is evident. The thermopower (S) is 160 mu V/K at room temperature, while the electrical resistivity (rho) is 65 m Omega cm. The effects of chemical substitutions on the Ir site (Ru, Pd) and Sn site (In, Sb) have been investigated. The power factor (S-2/rho) was found to improve with In substitution but, at 0.9 mu W/K-2 cm, is too small for this material to be useful for thermoelectric applications. (c) 2006 Elsevier Ltd. All rights reserved.
- Chemical synthesis
- Crystal structure and symmetry
- Electronic transport