Cs2PbO3 crystallizes in the orthorhombic Cmc2_1 space group. Cs(1) is bonded in a 7-coordinate geometry to three equivalent O(1) and four equivalent O(2) atoms. Pb(1) is bonded to one O(1) and four equivalent O(2) atoms to form distorted edge-sharing PbO5 trigonal bipyramids. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to six equivalent Cs(1) and one Pb(1) atom. In the second O site, O(2) is bonded to four equivalent Cs(1) and two equivalent Pb(1) atoms to form a mixture of distorted edge, face, and corner-sharing OCs4Pb2 octahedra. The corner-sharing octahedral tilt angles range from 37-49°.
Cs2PbO3 crystallizes in the orthorhombic Cmc2_1 space group. Cs(1) is bonded in a 7-coordinate geometry to three equivalent O(1) and four equivalent O(2) atoms. There are a spread of Cs(1)-O(1) bond distances ranging from 2.99-3.70 Å. There are a spread of Cs(1)-O(2) bond distances ranging from 3.05-3.21 Å. Pb(1) is bonded to one O(1) and four equivalent O(2) atoms to form distorted edge-sharing PbO5 trigonal bipyramids. The Pb(1)-O(1) bond length is 2.04 Å. All Pb(1)-O(2) bond lengths are 2.20 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to six equivalent Cs(1) and one Pb(1) atom. In the second O site, O(2) is bonded to four equivalent Cs(1) and two equivalent Pb(1) atoms to form a mixture of distorted edge, face, and corner-sharing OCs4Pb2 octahedra. The corner-sharing octahedral tilt angles range from 37-49°.