Rb7Au5O2 crystallizes in the orthorhombic Immm space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a linear geometry to four equivalent Au(2) and two equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded in a distorted linear geometry to two equivalent Au(2), two equivalent Au(3), and two equivalent O(1) atoms. In the third Rb site, Rb(3) is bonded in a distorted single-bond geometry to three equivalent Au(2), three equivalent Au(3), and one O(1) atom. There are three inequivalent Au sites. In the first Au site, Au(1) is bonded in a linear geometry to two equivalent O(1) atoms. In the second Au site, Au(2) is bonded in a distorted q6 geometry to two equivalent Rb(1), two equivalent Rb(2), and six equivalent Rb(3) atoms. In the third Au site, Au(3) is bonded in a distorted body-centered cubic geometry to two equivalent Rb(2) and six equivalent Rb(3) atoms. O(1) is bonded to one Rb(1), two equivalent Rb(2), two equivalent Rb(3), and one Au(1) atom to form corner-sharing ORb5Au octahedra. The corner-sharing octahedral tilt angles range from 0-2°.
Rb7Au5O2 crystallizes in the orthorhombic Immm space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a linear geometry to four equivalent Au(2) and two equivalent O(1) atoms. All Rb(1)-Au(2) bond lengths are 3.81 Å. Both Rb(1)-O(1) bond lengths are 2.66 Å. In the second Rb site, Rb(2) is bonded in a distorted linear geometry to two equivalent Au(2), two equivalent Au(3), and two equivalent O(1) atoms. Both Rb(2)-Au(2) bond lengths are 3.70 Å. Both Rb(2)-Au(3) bond lengths are 3.75 Å. Both Rb(2)-O(1) bond lengths are 2.85 Å. In the third Rb site, Rb(3) is bonded in a distorted single-bond geometry to three equivalent Au(2), three equivalent Au(3), and one O(1) atom. There is one shorter (3.63 Å) and two longer (3.86 Å) Rb(3)-Au(2) bond lengths. There is one shorter (3.48 Å) and two longer (3.55 Å) Rb(3)-Au(3) bond lengths. The Rb(3)-O(1) bond length is 2.77 Å. There are three inequivalent Au sites. In the first Au site, Au(1) is bonded in a linear geometry to two equivalent O(1) atoms. Both Au(1)-O(1) bond lengths are 2.01 Å. In the second Au site, Au(2) is bonded in a distorted q6 geometry to two equivalent Rb(1), two equivalent Rb(2), and six equivalent Rb(3) atoms. In the third Au site, Au(3) is bonded in a distorted body-centered cubic geometry to two equivalent Rb(2) and six equivalent Rb(3) atoms. O(1) is bonded to one Rb(1), two equivalent Rb(2), two equivalent Rb(3), and one Au(1) atom to form corner-sharing ORb5Au octahedra. The corner-sharing octahedral tilt angles range from 0-2°.