Rb6AgCuO4 crystallizes in the tetragonal P4_1 space group. There are six inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 4-coordinate geometry to two equivalent O(2) and two equivalent O(4) atoms. In the second Rb site, Rb(2) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(3) atoms. In the third Rb site, Rb(3) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the fourth Rb site, Rb(4) is bonded in a distorted tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the fifth Rb site, Rb(5) is bonded in a 5-coordinate geometry to one Cu(1), one O(3), one O(4), and two equivalent O(1) atoms. In the sixth Rb site, Rb(6) is bonded in a 2-coordinate geometry to one O(3), one O(4), and two equivalent O(2) atoms. Ag(1) is bonded in a linear geometry to one O(2) and one O(3) atom. Cu(1) is bonded in a linear geometry to one Rb(5), one O(1), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to one Rb(3), one Rb(4), two equivalent Rb(2), two equivalent Rb(5), and one Cu(1) atom. In the second O site, O(2) is bonded in a 7-coordinate geometry to one Rb(3), one Rb(4), two equivalent Rb(1), two equivalent Rb(6), and one Ag(1) atom. In the third O site, O(3) is bonded in a 7-coordinate geometry to one Rb(3), one Rb(4), one Rb(5), one Rb(6), two equivalent Rb(2), and one Ag(1) atom. In the fourth O site, O(4) is bonded in a 7-coordinate geometry to one Rb(3), one Rb(4), one Rb(5), one Rb(6), two equivalent Rb(1), and one Cu(1) atom.
Rb6AgCuO4 crystallizes in the tetragonal P4_1 space group. There are six inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 4-coordinate geometry to two equivalent O(2) and two equivalent O(4) atoms. There is one shorter (2.96 Å) and one longer (3.09 Å) Rb(1)-O(2) bond length. Both Rb(1)-O(4) bond lengths are 2.98 Å. In the second Rb site, Rb(2) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(3) atoms. There is one shorter (2.95 Å) and one longer (3.06 Å) Rb(2)-O(1) bond length. Both Rb(2)-O(3) bond lengths are 3.00 Å. In the third Rb site, Rb(3) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(3), and one O(4) atom. The Rb(3)-O(1) bond length is 3.10 Å. The Rb(3)-O(2) bond length is 3.11 Å. The Rb(3)-O(3) bond length is 2.98 Å. The Rb(3)-O(4) bond length is 2.93 Å. In the fourth Rb site, Rb(4) is bonded in a distorted tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. The Rb(4)-O(1) bond length is 2.92 Å. The Rb(4)-O(2) bond length is 2.90 Å. The Rb(4)-O(3) bond length is 3.10 Å. The Rb(4)-O(4) bond length is 3.07 Å. In the fifth Rb site, Rb(5) is bonded in a 5-coordinate geometry to one Cu(1), one O(3), one O(4), and two equivalent O(1) atoms. The Rb(5)-Cu(1) bond length is 3.38 Å. The Rb(5)-O(3) bond length is 3.19 Å. The Rb(5)-O(4) bond length is 2.87 Å. There is one shorter (2.86 Å) and one longer (3.31 Å) Rb(5)-O(1) bond length. In the sixth Rb site, Rb(6) is bonded in a 2-coordinate geometry to one O(3), one O(4), and two equivalent O(2) atoms. The Rb(6)-O(3) bond length is 2.68 Å. The Rb(6)-O(4) bond length is 3.29 Å. There is one shorter (2.67 Å) and one longer (3.36 Å) Rb(6)-O(2) bond length. Ag(1) is bonded in a linear geometry to one O(2) and one O(3) atom. The Ag(1)-O(2) bond length is 2.04 Å. The Ag(1)-O(3) bond length is 2.04 Å. Cu(1) is bonded in a linear geometry to one Rb(5), one O(1), and one O(4) atom. The Cu(1)-O(1) bond length is 1.82 Å. The Cu(1)-O(4) bond length is 1.83 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to one Rb(3), one Rb(4), two equivalent Rb(2), two equivalent Rb(5), and one Cu(1) atom. In the second O site, O(2) is bonded in a 7-coordinate geometry to one Rb(3), one Rb(4), two equivalent Rb(1), two equivalent Rb(6), and one Ag(1) atom. In the third O site, O(3) is bonded in a 7-coordinate geometry to one Rb(3), one Rb(4), one Rb(5), one Rb(6), two equivalent Rb(2), and one Ag(1) atom. In the fourth O site, O(4) is bonded in a 7-coordinate geometry to one Rb(3), one Rb(4), one Rb(5), one Rb(6), two equivalent Rb(1), and one Cu(1) atom.