SrTb2O4 crystallizes in the orthorhombic Pnma space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to one O(4), two equivalent O(2), and three equivalent O(3) atoms to form a mixture of edge and corner-sharing TbO6 octahedra. The corner-sharing octahedral tilt angles range from 51-65°. In the second Tb site, Tb(2) is bonded to one O(2), two equivalent O(4), and three equivalent O(1) atoms to form a mixture of edge and corner-sharing TbO6 octahedra. The corner-sharing octahedral tilt angles range from 51-65°. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1) and three equivalent Tb(2) atoms to form a mixture of distorted edge and corner-sharing OSr2Tb3 trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Sr(1), one Tb(2), and two equivalent Tb(1) atoms to form a mixture of distorted edge and corner-sharing OSr2Tb3 trigonal bipyramids. In the third O site, O(3) is bonded to two equivalent Sr(1) and three equivalent Tb(1) atoms to form a mixture of edge and corner-sharing OSr2Tb3 square pyramids. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to two equivalent Sr(1), one Tb(1), and two equivalent Tb(2) atoms.
SrTb2O4 crystallizes in the orthorhombic Pnma space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Both Sr(1)-O(1) bond lengths are 2.63 Å. There is one shorter (2.76 Å) and one longer (2.88 Å) Sr(1)-O(2) bond length. Both Sr(1)-O(3) bond lengths are 2.62 Å. Both Sr(1)-O(4) bond lengths are 2.72 Å. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to one O(4), two equivalent O(2), and three equivalent O(3) atoms to form a mixture of edge and corner-sharing TbO6 octahedra. The corner-sharing octahedral tilt angles range from 51-65°. The Tb(1)-O(4) bond length is 2.27 Å. Both Tb(1)-O(2) bond lengths are 2.22 Å. There is one shorter (2.33 Å) and two longer (2.38 Å) Tb(1)-O(3) bond lengths. In the second Tb site, Tb(2) is bonded to one O(2), two equivalent O(4), and three equivalent O(1) atoms to form a mixture of edge and corner-sharing TbO6 octahedra. The corner-sharing octahedral tilt angles range from 51-65°. The Tb(2)-O(2) bond length is 2.26 Å. Both Tb(2)-O(4) bond lengths are 2.32 Å. There is one shorter (2.27 Å) and two longer (2.34 Å) Tb(2)-O(1) bond lengths. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1) and three equivalent Tb(2) atoms to form a mixture of distorted edge and corner-sharing OSr2Tb3 trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Sr(1), one Tb(2), and two equivalent Tb(1) atoms to form a mixture of distorted edge and corner-sharing OSr2Tb3 trigonal bipyramids. In the third O site, O(3) is bonded to two equivalent Sr(1) and three equivalent Tb(1) atoms to form a mixture of edge and corner-sharing OSr2Tb3 square pyramids. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to two equivalent Sr(1), one Tb(1), and two equivalent Tb(2) atoms.