Y3AgO5 crystallizes in the trigonal R3m space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded in a 5-coordinate geometry to one O(2), one O(4), one O(9), and two equivalent O(7) atoms. In the second Y site, Y(2) is bonded in a 6-coordinate geometry to one O(1), one O(4), one O(5), one O(8), and two equivalent O(9) atoms. In the third Y site, Y(3) is bonded in a 5-coordinate geometry to one O(3), one O(6), one O(7), and two equivalent O(8) atoms. There are three inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a tetrahedral geometry to one O(1) and three equivalent O(7) atoms. In the second Ag site, Ag(2) is bonded in a tetrahedral geometry to one O(2) and three equivalent O(8) atoms. In the third Ag site, Ag(3) is bonded in a rectangular see-saw-like geometry to one O(3) and three equivalent O(9) atoms. There are nine inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Y(2) and one Ag(1) atom to form OY3Ag trigonal pyramids that share corners with three equivalent O(4)Y6 octahedra, corners with three equivalent O(7)Y3Ag tetrahedra, corners with three equivalent O(8)Y3Ag tetrahedra, and corners with six equivalent O(9)Y3Ag tetrahedra. The corner-sharing octahedral tilt angles are 48°. In the second O site, O(2) is bonded to three equivalent Y(1) and one Ag(2) atom to form OY3Ag tetrahedra that share corners with three equivalent O(8)Y3Ag tetrahedra, corners with three equivalent O(9)Y3Ag tetrahedra, corners with six equivalent O(7)Y3Ag tetrahedra, and  a faceface with one O(4)Y6 octahedra. In the third O site, O(3) is bonded to three equivalent Y(3) and one Ag(3) atom to form corner-sharing OY3Ag trigonal pyramids. In the fourth O site, O(4) is bonded to three equivalent Y(1) and three equivalent Y(2) atoms to form a mixture of face and corner-sharing OY6 octahedra. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to three equivalent Y(2) atoms. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Y(3) atoms. In the seventh O site, O(7) is bonded to one Y(3), two equivalent Y(1), and one Ag(1) atom to form OY3Ag tetrahedra that share corners with two equivalent O(4)Y6 octahedra, corners with two equivalent O(2)Y3Ag tetrahedra, corners with two equivalent O(8)Y3Ag tetrahedra, corners with two equivalent O(9)Y3Ag tetrahedra, corners with four equivalent O(7)Y3Ag tetrahedra,  a cornercorner with one O(1)Y3Ag trigonal pyramid, and  a cornercorner with one O(3)Y3Ag trigonal pyramid. The corner-sharing octahedral tilt angles are 55°. In the eighth O site, O(8) is bonded to one Y(2), two equivalent Y(3), and one Ag(2) atom to form OY3Ag tetrahedra that share  a cornercorner with one O(4)Y6 octahedra,  a cornercorner with one O(2)Y3Ag tetrahedra, corners with two equivalent O(7)Y3Ag tetrahedra, corners with two equivalent O(9)Y3Ag tetrahedra, corners with four equivalent O(8)Y3Ag tetrahedra,  a cornercorner with one O(1)Y3Ag trigonal pyramid, and corners with two equivalent O(3)Y3Ag trigonal pyramids. The corner-sharing octahedral tilt angles are 43°. In the ninth O site, O(9) is bonded to one Y(1), two equivalent Y(2), and one Ag(3) atom to form distorted OY3Ag tetrahedra that share  a cornercorner with one O(2)Y3Ag tetrahedra, corners with two equivalent O(7)Y3Ag tetrahedra, corners with two equivalent O(8)Y3Ag tetrahedra, corners with four equivalent O(9)Y3Ag tetrahedra,  a cornercorner with one O(3)Y3Ag trigonal pyramid, corners with two equivalent O(1)Y3Ag trigonal pyramids, and  a faceface with one O(4)Y6 octahedra.
Y3AgO5 crystallizes in the trigonal R3m space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded in a 5-coordinate geometry to one O(2), one O(4), one O(9), and two equivalent O(7) atoms. The Y(1)-O(2) bond length is 2.29 Å. The Y(1)-O(4) bond length is 2.44 Å. The Y(1)-O(9) bond length is 2.25 Å. Both Y(1)-O(7) bond lengths are 2.25 Å. In the second Y site, Y(2) is bonded in a 6-coordinate geometry to one O(1), one O(4), one O(5), one O(8), and two equivalent O(9) atoms. The Y(2)-O(1) bond length is 2.32 Å. The Y(2)-O(4) bond length is 2.53 Å. The Y(2)-O(5) bond length is 2.21 Å. The Y(2)-O(8) bond length is 2.31 Å. Both Y(2)-O(9) bond lengths are 2.29 Å. In the third Y site, Y(3) is bonded in a 5-coordinate geometry to one O(3), one O(6), one O(7), and two equivalent O(8) atoms. The Y(3)-O(3) bond length is 2.31 Å. The Y(3)-O(6) bond length is 2.18 Å. The Y(3)-O(7) bond length is 2.55 Å. Both Y(3)-O(8) bond lengths are 2.23 Å. There are three inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a tetrahedral geometry to one O(1) and three equivalent O(7) atoms. The Ag(1)-O(1) bond length is 2.29 Å. All Ag(1)-O(7) bond lengths are 2.33 Å. In the second Ag site, Ag(2) is bonded in a tetrahedral geometry to one O(2) and three equivalent O(8) atoms. The Ag(2)-O(2) bond length is 2.14 Å. All Ag(2)-O(8) bond lengths are 2.22 Å. In the third Ag site, Ag(3) is bonded in a rectangular see-saw-like geometry to one O(3) and three equivalent O(9) atoms. The Ag(3)-O(3) bond length is 2.27 Å. All Ag(3)-O(9) bond lengths are 2.31 Å. There are nine inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Y(2) and one Ag(1) atom to form OY3Ag trigonal pyramids that share corners with three equivalent O(4)Y6 octahedra, corners with three equivalent O(7)Y3Ag tetrahedra, corners with three equivalent O(8)Y3Ag tetrahedra, and corners with six equivalent O(9)Y3Ag tetrahedra. The corner-sharing octahedral tilt angles are 48°. In the second O site, O(2) is bonded to three equivalent Y(1) and one Ag(2) atom to form OY3Ag tetrahedra that share corners with three equivalent O(8)Y3Ag tetrahedra, corners with three equivalent O(9)Y3Ag tetrahedra, corners with six equivalent O(7)Y3Ag tetrahedra, and  a faceface with one O(4)Y6 octahedra. In the third O site, O(3) is bonded to three equivalent Y(3) and one Ag(3) atom to form corner-sharing OY3Ag trigonal pyramids. In the fourth O site, O(4) is bonded to three equivalent Y(1) and three equivalent Y(2) atoms to form a mixture of face and corner-sharing OY6 octahedra. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to three equivalent Y(2) atoms. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Y(3) atoms. In the seventh O site, O(7) is bonded to one Y(3), two equivalent Y(1), and one Ag(1) atom to form OY3Ag tetrahedra that share corners with two equivalent O(4)Y6 octahedra, corners with two equivalent O(2)Y3Ag tetrahedra, corners with two equivalent O(8)Y3Ag tetrahedra, corners with two equivalent O(9)Y3Ag tetrahedra, corners with four equivalent O(7)Y3Ag tetrahedra,  a cornercorner with one O(1)Y3Ag trigonal pyramid, and  a cornercorner with one O(3)Y3Ag trigonal pyramid. The corner-sharing octahedral tilt angles are 55°. In the eighth O site, O(8) is bonded to one Y(2), two equivalent Y(3), and one Ag(2) atom to form OY3Ag tetrahedra that share  a cornercorner with one O(4)Y6 octahedra,  a cornercorner with one O(2)Y3Ag tetrahedra, corners with two equivalent O(7)Y3Ag tetrahedra, corners with two equivalent O(9)Y3Ag tetrahedra, corners with four equivalent O(8)Y3Ag tetrahedra,  a cornercorner with one O(1)Y3Ag trigonal pyramid, and corners with two equivalent O(3)Y3Ag trigonal pyramids. The corner-sharing octahedral tilt angles are 43°. In the ninth O site, O(9) is bonded to one Y(1), two equivalent Y(2), and one Ag(3) atom to form distorted OY3Ag tetrahedra that share  a cornercorner with one O(2)Y3Ag tetrahedra, corners with two equivalent O(7)Y3Ag tetrahedra, corners with two equivalent O(8)Y3Ag tetrahedra, corners with four equivalent O(9)Y3Ag tetrahedra,  a cornercorner with one O(3)Y3Ag trigonal pyramid, corners with two equivalent O(1)Y3Ag trigonal pyramids, and  a faceface with one O(4)Y6 octahedra.