Synthesis, structure, and magnetic properties of Ba2Cu2US5 |
| |
Authors: | Hui-yi Zeng |
| |
Institution: | Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208-3113, USA |
| |
Abstract: | The alkaline-earth uranium chalcogenide Ba2Cu2US5 was obtained in a two-step reaction from BaS, Cu2S, and US2. Ba2Cu2US5 crystallizes in a new structure type in space group C2/m of the monoclinic system with two formula units in a cell of dimensions a=13.606(3) Å, b=4.0825(8) Å, c=9.3217(19) Å, and β=116.32(3)° (153 K). The structure consists of layers separated by Ba atoms in bicapped trigonal-prismatic coordination. The two-dimensional layer is built from US6 octahedra and CuS4 tetrahedra. The connectivity of the MSn polyhedra within the layer in the 001] direction is oct tet tet oct tet tet. A μeff value of 2.69(2) μB/U was obtained from the magnetic susceptibility data. No magnetic transition was observed for Ba2Cu2US5 down to 2 K. |
| |
Keywords: | Uranium Alkaline-earth Crystal structure Magnetism Synthesis Layered structure |
本文献已被 ScienceDirect 等数据库收录! |
|