U2S3 is Stibnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent U sites. In the first U site, U(1) is bonded to two equivalent S(1), two equivalent S(3), and three equivalent S(2) atoms to form a mixture of distorted edge and corner-sharing US7 pentagonal bipyramids. In the second U site, U(2) is bonded in a 8-coordinate geometry to two equivalent S(2), three equivalent S(1), and three equivalent S(3) atoms. There are three inequivalent S sites. In the first S site, S(1) is bonded to two equivalent U(1) and three equivalent U(2) atoms to form a mixture of distorted edge and corner-sharing SU5 trigonal bipyramids. In the second S site, S(2) is bonded to two equivalent U(2) and three equivalent U(1) atoms to form a mixture of edge and corner-sharing SU5 square pyramids. In the third S site, S(3) is bonded in a 5-coordinate geometry to two equivalent U(1) and three equivalent U(2) atoms.
U2S3 is Stibnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent U sites. In the first U site, U(1) is bonded to two equivalent S(1), two equivalent S(3), and three equivalent S(2) atoms to form a mixture of distorted edge and corner-sharing US7 pentagonal bipyramids. Both U(1)-S(1) bond lengths are 2.82 Å. There is one shorter (2.82 Å) and one longer (2.86 Å) U(1)-S(3) bond length. There are two shorter (2.81 Å) and one longer (2.82 Å) U(1)-S(2) bond length. In the second U site, U(2) is bonded in a 8-coordinate geometry to two equivalent S(2), three equivalent S(1), and three equivalent S(3) atoms. Both U(2)-S(2) bond lengths are 2.88 Å. There are two shorter (2.89 Å) and one longer (2.91 Å) U(2)-S(1) bond length. There are two shorter (2.86 Å) and one longer (3.40 Å) U(2)-S(3) bond length. There are three inequivalent S sites. In the first S site, S(1) is bonded to two equivalent U(1) and three equivalent U(2) atoms to form a mixture of distorted edge and corner-sharing SU5 trigonal bipyramids. In the second S site, S(2) is bonded to two equivalent U(2) and three equivalent U(1) atoms to form a mixture of edge and corner-sharing SU5 square pyramids. In the third S site, S(3) is bonded in a 5-coordinate geometry to two equivalent U(1) and three equivalent U(2) atoms.