Abstrakt
Crystal structure, magnetization, and specific heat were studied on single crystal of uranium intermetallic compound UOsAl. It is a hexagonal Laves phase of MgZn2 type, space group P6(3)/mmc, with lattice parameters a=536.4 pm, c=845.3 pm.
Shortest inter-uranium distance 313 pm (along the c-axis) is considerably smaller than the Hill limit (340 pm). The compound is a weakly temperature-dependent paramagnet with magnetic susceptibility of approximate to 1.5*10(-8) m(3) mol(-1) (at T= 2K), which is slightly higher with magnetic field along the a-axis compared to the c-axis.
The Sommerfeld coefficient of electronic specific heat has moderate value of gamma=36 mJ mol(-1) K-2.