TbPO4 crystallizes in the orthorhombic Pbcm space group. Tb(1) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), and six equivalent O(1) atoms. P(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing PO6 octahedra. The corner-sharing octahedral tilt angles range from 39-46°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to three equivalent Tb(1) and one P(1) atom. In the second O site, O(2) is bonded to two equivalent Tb(1) and two equivalent P(1) atoms to form distorted corner-sharing OTb2P2 trigonal pyramids. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Tb(1) and two equivalent P(1) atoms.
TbPO4 crystallizes in the orthorhombic Pbcm space group. Tb(1) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), and six equivalent O(1) atoms. Both Tb(1)-O(2) bond lengths are 2.44 Å. There is one shorter (2.28 Å) and one longer (2.95 Å) Tb(1)-O(3) bond length. There are a spread of Tb(1)-O(1) bond distances ranging from 2.34-2.55 Å. P(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing PO6 octahedra. The corner-sharing octahedral tilt angles range from 39-46°. Both P(1)-O(1) bond lengths are 1.60 Å. Both P(1)-O(2) bond lengths are 1.88 Å. Both P(1)-O(3) bond lengths are 1.82 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to three equivalent Tb(1) and one P(1) atom. In the second O site, O(2) is bonded to two equivalent Tb(1) and two equivalent P(1) atoms to form distorted corner-sharing OTb2P2 trigonal pyramids. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Tb(1) and two equivalent P(1) atoms.