KEu2Cl7 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 6-coordinate geometry to one Cl(1), one Cl(2), one Cl(3), one Cl(5), one Cl(6), and one Cl(7) atom. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to one Cl(1), one Cl(2), one Cl(3), one Cl(4), one Cl(5), one Cl(6), and one Cl(7) atom to form a mixture of distorted face and edge-sharing EuCl7 pentagonal bipyramids. In the second Eu site, Eu(2) is bonded to one Cl(1), one Cl(2), one Cl(3), one Cl(4), one Cl(5), one Cl(6), and one Cl(7) atom to form a mixture of distorted face and edge-sharing EuCl7 pentagonal bipyramids. There are seven inequivalent Cl sites. In the first Cl site, Cl(6) is bonded in a distorted L-shaped geometry to one K(1), one Eu(1), and one Eu(2) atom. In the second Cl site, Cl(7) is bonded in a trigonal non-coplanar geometry to one K(1), one Eu(1), and one Eu(2) atom. In the third Cl site, Cl(1) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one Eu(1), and one Eu(2) atom. In the fourth Cl site, Cl(2) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one Eu(1), and one Eu(2) atom. In the fifth Cl site, Cl(3) is bonded in a distorted T-shaped geometry to one K(1), one Eu(1), and one Eu(2) atom. In the sixth Cl site, Cl(4) is bonded in a water-like geometry to one Eu(1) and one Eu(2) atom. In the seventh Cl site, Cl(5) is bonded in a trigonal non-coplanar geometry to one K(1), one Eu(1), and one Eu(2) atom.
KEu2Cl7 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 6-coordinate geometry to one Cl(1), one Cl(2), one Cl(3), one Cl(5), one Cl(6), and one Cl(7) atom. The K(1)-Cl(1) bond length is 3.68 Å. The K(1)-Cl(2) bond length is 3.36 Å. The K(1)-Cl(3) bond length is 3.60 Å. The K(1)-Cl(5) bond length is 3.15 Å. The K(1)-Cl(6) bond length is 3.72 Å. The K(1)-Cl(7) bond length is 3.19 Å. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to one Cl(1), one Cl(2), one Cl(3), one Cl(4), one Cl(5), one Cl(6), and one Cl(7) atom to form a mixture of distorted face and edge-sharing EuCl7 pentagonal bipyramids. The Eu(1)-Cl(1) bond length is 2.79 Å. The Eu(1)-Cl(2) bond length is 2.87 Å. The Eu(1)-Cl(3) bond length is 2.81 Å. The Eu(1)-Cl(4) bond length is 2.82 Å. The Eu(1)-Cl(5) bond length is 2.79 Å. The Eu(1)-Cl(6) bond length is 2.80 Å. The Eu(1)-Cl(7) bond length is 2.87 Å. In the second Eu site, Eu(2) is bonded to one Cl(1), one Cl(2), one Cl(3), one Cl(4), one Cl(5), one Cl(6), and one Cl(7) atom to form a mixture of distorted face and edge-sharing EuCl7 pentagonal bipyramids. The Eu(2)-Cl(1) bond length is 2.85 Å. The Eu(2)-Cl(2) bond length is 2.82 Å. The Eu(2)-Cl(3) bond length is 2.83 Å. The Eu(2)-Cl(4) bond length is 2.77 Å. The Eu(2)-Cl(5) bond length is 2.86 Å. The Eu(2)-Cl(6) bond length is 2.82 Å. The Eu(2)-Cl(7) bond length is 2.80 Å. There are seven inequivalent Cl sites. In the first Cl site, Cl(6) is bonded in a distorted L-shaped geometry to one K(1), one Eu(1), and one Eu(2) atom. In the second Cl site, Cl(7) is bonded in a trigonal non-coplanar geometry to one K(1), one Eu(1), and one Eu(2) atom. In the third Cl site, Cl(1) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one Eu(1), and one Eu(2) atom. In the fourth Cl site, Cl(2) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one Eu(1), and one Eu(2) atom. In the fifth Cl site, Cl(3) is bonded in a distorted T-shaped geometry to one K(1), one Eu(1), and one Eu(2) atom. In the sixth Cl site, Cl(4) is bonded in a water-like geometry to one Eu(1) and one Eu(2) atom. In the seventh Cl site, Cl(5) is bonded in a trigonal non-coplanar geometry to one K(1), one Eu(1), and one Eu(2) atom.