RbEu2Cl7 crystallizes in the orthorhombic Pnma space group. Rb(1) is bonded in a 10-coordinate geometry to two equivalent Cl(1), two equivalent Cl(2), two equivalent Cl(4), and four equivalent Cl(3) atoms. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to one Cl(4), two equivalent Cl(1), two equivalent Cl(2), and two equivalent Cl(3) atoms to form a mixture of distorted edge and face-sharing EuCl7 pentagonal bipyramids. In the second Eu site, Eu(2) is bonded to one Cl(4), two equivalent Cl(1), two equivalent Cl(2), and two equivalent Cl(3) atoms to form a mixture of distorted edge and face-sharing EuCl7 pentagonal bipyramids. There are four inequivalent Cl sites. In the first Cl site, Cl(4) is bonded to two equivalent Rb(1), one Eu(1), and one Eu(2) atom to form a mixture of distorted edge and corner-sharing ClRb2Eu2 trigonal pyramids. In the second Cl site, Cl(1) is bonded in a distorted L-shaped geometry to one Rb(1), one Eu(1), and one Eu(2) atom. In the third Cl site, Cl(2) is bonded in a distorted trigonal non-coplanar geometry to one Rb(1), one Eu(1), and one Eu(2) atom. In the fourth Cl site, Cl(3) is bonded to two equivalent Rb(1), one Eu(1), and one Eu(2) atom to form a mixture of distorted edge and corner-sharing ClRb2Eu2 tetrahedra.
RbEu2Cl7 crystallizes in the orthorhombic Pnma space group. Rb(1) is bonded in a 10-coordinate geometry to two equivalent Cl(1), two equivalent Cl(2), two equivalent Cl(4), and four equivalent Cl(3) atoms. Both Rb(1)-Cl(1) bond lengths are 3.75 Å. Both Rb(1)-Cl(2) bond lengths are 3.62 Å. Both Rb(1)-Cl(4) bond lengths are 3.69 Å. There are two shorter (3.63 Å) and two longer (3.75 Å) Rb(1)-Cl(3) bond lengths. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to one Cl(4), two equivalent Cl(1), two equivalent Cl(2), and two equivalent Cl(3) atoms to form a mixture of distorted edge and face-sharing EuCl7 pentagonal bipyramids. The Eu(1)-Cl(4) bond length is 2.83 Å. Both Eu(1)-Cl(1) bond lengths are 2.79 Å. Both Eu(1)-Cl(2) bond lengths are 2.83 Å. Both Eu(1)-Cl(3) bond lengths are 2.77 Å. In the second Eu site, Eu(2) is bonded to one Cl(4), two equivalent Cl(1), two equivalent Cl(2), and two equivalent Cl(3) atoms to form a mixture of distorted edge and face-sharing EuCl7 pentagonal bipyramids. The Eu(2)-Cl(4) bond length is 2.79 Å. Both Eu(2)-Cl(1) bond lengths are 2.79 Å. Both Eu(2)-Cl(2) bond lengths are 2.75 Å. Both Eu(2)-Cl(3) bond lengths are 2.85 Å. There are four inequivalent Cl sites. In the first Cl site, Cl(4) is bonded to two equivalent Rb(1), one Eu(1), and one Eu(2) atom to form a mixture of distorted edge and corner-sharing ClRb2Eu2 trigonal pyramids. In the second Cl site, Cl(1) is bonded in a distorted L-shaped geometry to one Rb(1), one Eu(1), and one Eu(2) atom. In the third Cl site, Cl(2) is bonded in a distorted trigonal non-coplanar geometry to one Rb(1), one Eu(1), and one Eu(2) atom. In the fourth Cl site, Cl(3) is bonded to two equivalent Rb(1), one Eu(1), and one Eu(2) atom to form a mixture of distorted edge and corner-sharing ClRb2Eu2 tetrahedra.