Synthesis, crystal structure and magnetic properties of a new ternary uranium telluride: Tl0.56UTe3

The new ternary uranium telluride Tl0.56UTe3 crystallizes in the orthorhombic system (a = 4.212(2) Å, b = 23.287(7) Å, c = 6.091(3) Å), space group Cmcm. The structure was solved from X-ray diffraction data collected from a single crystal grown by the chemical vapor transport method. The structure of Tl0.5656UTe3 is built up from [UTe3] layers separated by Tl planes, with a partial occupation of the Tl sites. Magnetic measurements show that Tl0.56UTe3 is paramagnetic down to 2 K.