Uranium trisulfide, US3

Uranium tris­ulfide, US3, is isostructural with USe3, which has the ZrSe3 structure type. In the asymmetric unit, the site symmetries of the U atom and the three S atoms are m. The structure consists of two-dimensional layers that stack perpendicular to the [001] direction. Each layer comprises US8 bicapped trigonal prisms that edge share in the [100] direction and face share in the [010] direction. The compound may be described as U4+(S2−)(S22−).