Synthesis and crystal structure of EuBi2

摘要

The new hypervalent binary phase EuBi2 was obtained from high temperature solid-state reactions of the pure metal elements in welded Ta tubes under argon atmosphere. Its structure was established by single-crystal X-ray diffraction. The title compound crystallizes in the tetragonal space group I4(1)/amd (No. 141) with cell parameters of a = 4.726(1), c = 34.221(9) Angstrom, V = 764.3(3) Angstrom(3), and Z = 8. The structure of EuBi2 is isotypic with HfGa2 and features 1D Bi- zigzag anionic chains along both a- and b-axes and 2D Bi- square sheets normal to c-axis. It can be formulated as Eu2+(Bi)(chain)(-)(Bi)(square)(-). (C) 2004 Elsevier Inc. All rights reserved.