Superconductivity in a new compound of Zr2CuSb3 composition

In the Zr-Cu-Sb system there is a phase of Zr$_{2}$CuSb$_{3}$ composition which represents a ternary compound. This phase crystallize in a new prototype structure Zr$_{2}$CuSb$_{3}$ which have a tetragonal symmetry with space group P-4m2. The lattice parameters are a=3.9404 {\AA} and c=8.6971 {\AA}. This structure can be represented as sequence of 1Zr.4Sb.2Cu.2Sb and (4Sb) which form like layer compound. However, the literature is very poor in results about the properties of this compound. Thus, in this work we show results which suggest the existence of superconductivity with superconducting critical temperature close to 8.0 K. These conclusions were obtained through X-ray diffraction, magnetization, and resistivity measurements.