In the course of our current research on quaternary phases in the systems Sr-Ni-C-N, [1] we are also interested in binary phases of the system SrÀNi, in order to use them starting material for reactions. The binary system Sr À Ni was first investigated in 1966.[2] According to this study, SrNi is the only intermediate phase. Our recent investigation of the same system (Figure 1) did not confirm the existence of SrNi (peritectic decomposition at 860 8C; hexagonal unit cell with a = 332 pm, c = 701 pm).[2] Instead, a new phase (Sr 2 Ni 3 , peritectic decomposition at 941 8C, Figure S1 in the Supporting Information) was obtained and the crystal structure was solved from synchrotron powder-diffraction data (P3 m1 (# 164), a = 412.617(1) pm, c = 868.567 (1)