Room-temperature
superconductivity has always been an area of intensive
research. Recent findings of clathrate metal hydrides structures have
opened up the doors for achieving room-temperature superconductivity
in these materials. Here, we report first-principles calculations
for stable H-rich clathrate structures of uranium hydrides at high
pressures. The clathrate uranium hydrides contain H cages with stoichiometries
of H24, H29, and H32, in which H
atoms are bonded covalently to other H atoms, and U atoms occupy the
centers of the cages. Especially, a UH10 clathrate structure
containing H32 cages is predicted to have an estimated Tc higher than 77 K at high pressures.