NaTbMn4O12 crystallizes in the tetragonal P4/mmm space group. Na(1) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form NaO12 cuboctahedra that share corners with four equivalent Na(1)O12 cuboctahedra, corners with eight equivalent Tb(1)O12 cuboctahedra, and faces with eight equivalent Mn(1)O6 octahedra. Tb(1) is bonded to four equivalent O(3) and eight equivalent O(1) atoms to form TbO12 cuboctahedra that share corners with four equivalent Tb(1)O12 cuboctahedra, corners with eight equivalent Na(1)O12 cuboctahedra, and faces with eight equivalent Mn(1)O6 octahedra. Mn(1) is bonded to one O(2), one O(3), and four equivalent O(1) atoms to form MnO6 octahedra that share corners with six equivalent Mn(1)O6 octahedra, faces with two equivalent Na(1)O12 cuboctahedra, and faces with two equivalent Tb(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-16°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Na(1), one Tb(1), and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a distorted square co-planar geometry to two equivalent Na(1) and two equivalent Mn(1) atoms. In the third O site, O(3) is bonded in a distorted linear geometry to two equivalent Tb(1) and two equivalent Mn(1) atoms.
NaTbMn4O12 crystallizes in the tetragonal P4/mmm space group. Na(1) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form NaO12 cuboctahedra that share corners with four equivalent Na(1)O12 cuboctahedra, corners with eight equivalent Tb(1)O12 cuboctahedra, and faces with eight equivalent Mn(1)O6 octahedra. All Na(1)-O(2) bond lengths are 2.66 Å. All Na(1)-O(1) bond lengths are 2.88 Å. Tb(1) is bonded to four equivalent O(3) and eight equivalent O(1) atoms to form TbO12 cuboctahedra that share corners with four equivalent Tb(1)O12 cuboctahedra, corners with eight equivalent Na(1)O12 cuboctahedra, and faces with eight equivalent Mn(1)O6 octahedra. All Tb(1)-O(3) bond lengths are 2.66 Å. All Tb(1)-O(1) bond lengths are 2.49 Å. Mn(1) is bonded to one O(2), one O(3), and four equivalent O(1) atoms to form MnO6 octahedra that share corners with six equivalent Mn(1)O6 octahedra, faces with two equivalent Na(1)O12 cuboctahedra, and faces with two equivalent Tb(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-16°. The Mn(1)-O(2) bond length is 1.84 Å. The Mn(1)-O(3) bond length is 1.98 Å. All Mn(1)-O(1) bond lengths are 1.90 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Na(1), one Tb(1), and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a distorted square co-planar geometry to two equivalent Na(1) and two equivalent Mn(1) atoms. In the third O site, O(3) is bonded in a distorted linear geometry to two equivalent Tb(1) and two equivalent Mn(1) atoms.