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Sn3Tb is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Tb is bonded to twelve equivalent Sn atoms to form a mixture of face and corner-sharing TbSn12 cuboctahedra. All Tb–Sn bond lengths are 3.34 Å. Sn is bonded in a distorted square co-planar geometry to four equivalent Tb atoms.
Tb3Sn7 crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. there are two inequivalent Tb sites. In the first Tb site, Tb is bonded to twelve Sn atoms to form a mixture of corner and face-sharing TbSn12 cuboctahedra. There are four shorter (3.18 Å) and eight longer (3.37 Å) Tb–Sn bond lengths. In the second Tb site, Tb is bonded in a 10-coordinate geometry to ten Sn atoms. There are a spread of Tb–Sn bond distances ranging from 3.24–3.45 Å. There are four inequivalent Sn sites. In the first Sn site, Sn is bonded in a square co-planar geometry to four equivalent Tb and eight Sn atoms. All Sn–Sn bond lengths are 3.37 Å. In the second Sn site, Sn is bonded in a 10-coordinate geometry to four Tb and six Sn atoms. All Sn–Sn bond lengths are 3.18 Å. In the third Sn site, Sn is bonded in a 10-coordinate geometry to four Tb and six Sn atoms. In the fourth Sn site, Sn is bonded in a 8-coordinate geometry to six equivalent Tb and two equivalent Sn atoms. Both Sn–Sn bond lengths are 3.02 Å.
Sn10Tb11 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are four inequivalent Tb sites. In the first Tb site, Tb is bonded to seven Sn atoms to form a mixture of distorted edge, corner, and face-sharing TbSn7 pentagonal bipyramids. There are a spread of Tb–Sn bond distances ranging from 3.09–3.47 Å. In the second Tb site, Tb is bonded in a 7-coordinate geometry to seven Sn atoms. There are a spread of Tb–Sn bond distances ranging from 2.95–3.61 Å. In the third Tb site, Tb is bonded in a 9-coordinate geometry to nine Sn atoms. There are a spread of Tb–Sn bond distances ranging from 3.43–3.87 Å. In the fourth Tb site, Tb is bonded in a 7-coordinate geometry to seven Sn atoms. There are a spread of Tb–Sn bond distances ranging from 3.09–3.29 Å. There are five inequivalent Sn sites. In the first Sn site, Sn is bonded in a 8-coordinate geometry to eight Tb atoms. In the second Sn site, Sn is bonded in a 9-coordinate geometry to nine Tb atoms. In the third Sn site, Sn is bonded in a 11-coordinate geometry to seven Tb and four Sn atoms. There are two shorter (3.03 Å) and two longer (3.29 Å) Sn–Sn bond lengths. In the fourth Sn site, Sn is bonded in a 8-coordinate geometry to eight Tb atoms. In the fifth Sn site, Sn is bonded in a 2-coordinate geometry to eight Tb and two Sn atoms. The Sn–Sn bond length is 2.92 Å.
Tb5Sn3 crystallizes in the hexagonal P6_3/mcm space group. The structure is three-dimensional. there are two inequivalent Tb sites. In the first Tb site, Tb is bonded in a 6-coordinate geometry to six equivalent Sn atoms. All Tb–Sn bond lengths are 3.23 Å. In the second Tb site, Tb is bonded in a 5-coordinate geometry to five equivalent Sn atoms. There are a spread of Tb–Sn bond distances ranging from 3.10–3.58 Å. Sn is bonded in a 9-coordinate geometry to nine Tb atoms.