Vingt nouveaux germaniures ternaires TR5T4Ge10 de metaux tr des terres rares et T = Co, Rh, Ir. Supraconductivite de Lu5Rh4Ge10 et Lu5Ir4Ge10

Abstract Twenty ternary germanides, which crystallize in the Sc 5 Co 4 Si 10 type, have been prepared in the RE-T-Ge systems where RE is a rare earth and T = Co, Rh, Ir: with Co, RE = Tm-Lu; with Rh, RE = Y, Gd-Lu; with Ir, RE = Gd-Lu. Lu 5 Rh 4 Ge 10 and Lu 5 Ir 4 Ge 10 show superconducting transitions at 2.2−1.6 K and 2.01−1.94 K respectively.