Y2S3 is Stibnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Y sites. In the first Y site, Y(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 YS7 pentagonal bipyramids. In the second Y site, Y(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 Y(1) and three equivalent Y(2) atoms to form a mixture of distorted edge and corner-sharing SY5 trigonal bipyramids. In the second S site, S(2) is bonded to two equivalent Y(2) and three equivalent Y(1) atoms to form a mixture of edge and corner-sharing SY5 square pyramids. In the third S site, S(3) is bonded in a 5-coordinate geometry to two equivalent Y(1) and three equivalent Y(2) atoms.
Y2S3 is Stibnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Y sites. In the first Y site, Y(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 YS7 pentagonal bipyramids. Both Y(1)-S(1) bond lengths are 2.78 Å. There is one shorter (2.80 Å) and one longer (2.81 Å) Y(1)-S(3) bond length. There are two shorter (2.74 Å) and one longer (2.80 Å) Y(1)-S(2) bond length. In the second Y site, Y(2) is bonded in a 8-coordinate geometry to two equivalent S(2), three equivalent S(1), and three equivalent S(3) atoms. Both Y(2)-S(2) bond lengths are 2.86 Å. All Y(2)-S(1) bond lengths are 2.84 Å. There are two shorter (2.81 Å) and one longer (3.36 Å) Y(2)-S(3) bond length. There are three inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Y(1) and three equivalent Y(2) atoms to form a mixture of distorted edge and corner-sharing SY5 trigonal bipyramids. In the second S site, S(2) is bonded to two equivalent Y(2) and three equivalent Y(1) atoms to form a mixture of edge and corner-sharing SY5 square pyramids. In the third S site, S(3) is bonded in a 5-coordinate geometry to two equivalent Y(1) and three equivalent Y(2) atoms.