YbNb5Ag2O15 crystallizes in the tetragonal P4/mbm space group. Yb(1) is bonded to four equivalent O(1) and eight equivalent O(4) atoms to form YbO12 cuboctahedra that share faces with two equivalent Yb(1)O12 cuboctahedra and faces with eight equivalent Nb(2)O6 octahedra. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to two equivalent O(3) and four equivalent O(5) atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 0-32°. In the second Nb site, Nb(2) is bonded to one O(2), one O(5), two equivalent O(1), and two equivalent O(4) atoms to form NbO6 octahedra that share  a cornercorner with one Nb(1)O6 octahedra, corners with five equivalent Nb(2)O6 octahedra, and faces with two equivalent Yb(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 12-45°. Ag(1) is bonded in a water-like geometry to two equivalent O(2) atoms. There are five inequivalent O sites. In the first O site, O(5) is bonded in a bent 150 degrees geometry to one Nb(1) and one Nb(2) atom. In the second O site, O(1) is bonded in a distorted T-shaped geometry to one Yb(1) and two equivalent Nb(2) atoms. In the third O site, O(2) is bonded to two equivalent Nb(2) and two equivalent Ag(1) atoms to form distorted corner-sharing ONb2Ag2 tetrahedra. In the fourth O site, O(3) is bonded in a linear geometry to two equivalent Nb(1) atoms. In the fifth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Yb(1) and two equivalent Nb(2) atoms.
YbNb5Ag2O15 crystallizes in the tetragonal P4/mbm space group. Yb(1) is bonded to four equivalent O(1) and eight equivalent O(4) atoms to form YbO12 cuboctahedra that share faces with two equivalent Yb(1)O12 cuboctahedra and faces with eight equivalent Nb(2)O6 octahedra. All Yb(1)-O(1) bond lengths are 2.66 Å. All Yb(1)-O(4) bond lengths are 2.67 Å. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to two equivalent O(3) and four equivalent O(5) atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 0-32°. Both Nb(1)-O(3) bond lengths are 1.97 Å. All Nb(1)-O(5) bond lengths are 2.02 Å. In the second Nb site, Nb(2) is bonded to one O(2), one O(5), two equivalent O(1), and two equivalent O(4) atoms to form NbO6 octahedra that share  a cornercorner with one Nb(1)O6 octahedra, corners with five equivalent Nb(2)O6 octahedra, and faces with two equivalent Yb(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 12-45°. The Nb(2)-O(2) bond length is 2.04 Å. The Nb(2)-O(5) bond length is 1.94 Å. Both Nb(2)-O(1) bond lengths are 1.99 Å. There is one shorter (1.98 Å) and one longer (2.07 Å) Nb(2)-O(4) bond length. Ag(1) is bonded in a water-like geometry to two equivalent O(2) atoms. Both Ag(1)-O(2) bond lengths are 2.62 Å. There are five inequivalent O sites. In the first O site, O(5) is bonded in a bent 150 degrees geometry to one Nb(1) and one Nb(2) atom. In the second O site, O(1) is bonded in a distorted T-shaped geometry to one Yb(1) and two equivalent Nb(2) atoms. In the third O site, O(2) is bonded to two equivalent Nb(2) and two equivalent Ag(1) atoms to form distorted corner-sharing ONb2Ag2 tetrahedra. In the fourth O site, O(3) is bonded in a linear geometry to two equivalent Nb(1) atoms. In the fifth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Yb(1) and two equivalent Nb(2) atoms.