Crystal structure and magnetic susceptibility of a Ru2Si 3 single crystal

X-ray diffraction photographic experiments and anisotropic magnetic susceptibility measurement were made to examine the crystal structure of a Ru₂Si₃ single crystal. The X-ray analysis revealed that the single crystal possesses a tetragonal symmetry. Some very weak X-ray diffraction spots suggest a superstructure with 4-times larger lattice constants than those of the conventional tetragonal lattice. It was found from the susceptibility measurement that the single crystal is diamagnetic at low temperatures ranging from 20 to 300 K, and that the susceptibilities are uni-axially anisotropic, which is consistent with the results of the X-ray diffraction experiments. It is concluded from the diamagnetic susceptibilities that coordinate bonding is established between Si and Ru atoms, which is consistent with the results of a previous magnetic susceptibility analysis of CrSi₂