K2Zr7Cl18 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded to one Cl(10), one Cl(11), one Cl(12), one Cl(13), one Cl(14), one Cl(15), one Cl(16), one Cl(17), one Cl(18), one Cl(4), one Cl(5), and one Cl(6) atom to form KCl12 cuboctahedra that share corners with three equivalent Zr(1)Cl6 octahedra,  a cornercorner with one Zr(2)Cl5 square pyramid,  a cornercorner with one Zr(3)Cl5 square pyramid,  a cornercorner with one Zr(4)Cl5 square pyramid,  a cornercorner with one Zr(5)Cl5 square pyramid,  a cornercorner with one Zr(6)Cl5 square pyramid,  a cornercorner with one Zr(7)Cl5 square pyramid, edges with three equivalent K(2)Cl12 cuboctahedra,  an edgeedge with one Zr(2)Cl5 square pyramid,  an edgeedge with one Zr(3)Cl5 square pyramid,  an edgeedge with one Zr(4)Cl5 square pyramid,  a faceface with one Zr(5)Cl5 square pyramid,  a faceface with one Zr(6)Cl5 square pyramid, and  a faceface with one Zr(7)Cl5 square pyramid. The corner-sharing octahedral tilt angles range from 46-47°. In the second K site, K(2) is bonded to one Cl(1), one Cl(10), one Cl(11), one Cl(12), one Cl(13), one Cl(14), one Cl(15), one Cl(2), one Cl(3), one Cl(7), one Cl(8), and one Cl(9) atom to form distorted KCl12 cuboctahedra that share corners with three equivalent Zr(1)Cl6 octahedra,  a cornercorner with one Zr(2)Cl5 square pyramid,  a cornercorner with one Zr(3)Cl5 square pyramid,  a cornercorner with one Zr(4)Cl5 square pyramid,  a cornercorner with one Zr(5)Cl5 square pyramid,  a cornercorner with one Zr(6)Cl5 square pyramid,  a cornercorner with one Zr(7)Cl5 square pyramid, edges with three equivalent K(1)Cl12 cuboctahedra,  an edgeedge with one Zr(5)Cl5 square pyramid,  an edgeedge with one Zr(6)Cl5 square pyramid,  an edgeedge with one Zr(7)Cl5 square pyramid,  a faceface with one Zr(2)Cl5 square pyramid,  a faceface with one Zr(3)Cl5 square pyramid, and  a faceface with one Zr(4)Cl5 square pyramid. The corner-sharing octahedral tilt angles range from 46-47°. There are seven inequivalent Zr sites. In the first Zr site, Zr(1) is bonded to one Cl(1), one Cl(2), one Cl(3), one Cl(4), one Cl(5), and one Cl(6) atom to form ZrCl6 octahedra that share corners with three equivalent K(1)Cl12 cuboctahedra, corners with three equivalent K(2)Cl12 cuboctahedra,  a cornercorner with one Zr(2)Cl5 square pyramid,  a cornercorner with one Zr(3)Cl5 square pyramid,  a cornercorner with one Zr(4)Cl5 square pyramid,  a cornercorner with one Zr(5)Cl5 square pyramid,  a cornercorner with one Zr(6)Cl5 square pyramid, and  a cornercorner with one Zr(7)Cl5 square pyramid. In the second Zr site, Zr(2) is bonded to one Cl(1), one Cl(13), one Cl(15), one Cl(17), and one Cl(9) atom to form ZrCl5 square pyramids that share  a cornercorner with one K(1)Cl12 cuboctahedra,  a cornercorner with one K(2)Cl12 cuboctahedra,  a cornercorner with one Zr(1)Cl6 octahedra,  a cornercorner with one Zr(3)Cl5 square pyramid,  a cornercorner with one Zr(4)Cl5 square pyramid,  a cornercorner with one Zr(6)Cl5 square pyramid,  a cornercorner with one Zr(7)Cl5 square pyramid,  an edgeedge with one K(1)Cl12 cuboctahedra, and  a faceface with one K(2)Cl12 cuboctahedra. The corner-sharing octahedral tilt angles are 46°. In the third Zr site, Zr(3) is bonded to one Cl(14), one Cl(15), one Cl(16), one Cl(2), and one Cl(7) atom to form ZrCl5 square pyramids that share  a cornercorner with one K(1)Cl12 cuboctahedra,  a cornercorner with one K(2)Cl12 cuboctahedra,  a cornercorner with one Zr(1)Cl6 octahedra,  a cornercorner with one Zr(2)Cl5 square pyramid,  a cornercorner with one Zr(4)Cl5 square pyramid,  a cornercorner with one Zr(5)Cl5 square pyramid,  a cornercorner with one Zr(7)Cl5 square pyramid,  an edgeedge with one K(1)Cl12 cuboctahedra, and  a faceface with one K(2)Cl12 cuboctahedra. The corner-sharing octahedral tilt angles are 45°. In the fourth Zr site, Zr(4) is bonded to one Cl(13), one Cl(14), one Cl(18), one Cl(3), and one Cl(8) atom to form distorted ZrCl5 square pyramids that share  a cornercorner with one K(1)Cl12 cuboctahedra,  a cornercorner with one K(2)Cl12 cuboctahedra,  a cornercorner with one Zr(1)Cl6 octahedra,  a cornercorner with one Zr(2)Cl5 square pyramid,  a cornercorner with one Zr(3)Cl5 square pyramid,  a cornercorner with one Zr(5)Cl5 square pyramid,  a cornercorner with one Zr(6)Cl5 square pyramid,  an edgeedge with one K(1)Cl12 cuboctahedra, and  a faceface with one K(2)Cl12 cuboctahedra. The corner-sharing octahedral tilt angles are 45°. In the fifth Zr site, Zr(5) is bonded to one Cl(10), one Cl(12), one Cl(16), one Cl(4), and one Cl(8) atom to form distorted ZrCl5 square pyramids that share  a cornercorner with one K(1)Cl12 cuboctahedra,  a cornercorner with one K(2)Cl12 cuboctahedra,  a cornercorner with one Zr(1)Cl6 octahedra,  a cornercorner with one Zr(3)Cl5 square pyramid,  a cornercorner with one Zr(4)Cl5 square pyramid,  a cornercorner with one Zr(6)Cl5 square pyramid,  a cornercorner with one Zr(7)Cl5 square pyramid,  an edgeedge with one K(2)Cl12 cuboctahedra, and  a faceface with one K(1)Cl12 cuboctahedra. The corner-sharing octahedral tilt angles are 45°. In the sixth Zr site, Zr(6) is bonded to one Cl(11), one Cl(12), one Cl(18), one Cl(5), and one Cl(9) atom to form ZrCl5 square pyramids that share  a cornercorner with one K(1)Cl12 cuboctahedra,  a cornercorner with one K(2)Cl12 cuboctahedra,  a cornercorner with one Zr(1)Cl6 octahedra,  a cornercorner with one Zr(2)Cl5 square pyramid,  a cornercorner with one Zr(4)Cl5 square pyramid,  a cornercorner with one Zr(5)Cl5 square pyramid,  a cornercorner with one Zr(7)Cl5 square pyramid,  an edgeedge with one K(2)Cl12 cuboctahedra, and  a faceface with one K(1)Cl12 cuboctahedra. The corner-sharing octahedral tilt angles are 46°. In the seventh Zr site, Zr(7) is bonded to one Cl(10), one Cl(11), one Cl(17), one Cl(6), and one Cl(7) atom to form ZrCl5 square pyramids that share  a cornercorner with one K(1)Cl12 cuboctahedra,  a cornercorner with one K(2)Cl12 cuboctahedra,  a cornercorner with one Zr(1)Cl6 octahedra,  a cornercorner with one Zr(2)Cl5 square pyramid,  a cornercorner with one Zr(3)Cl5 square pyramid,  a cornercorner with one Zr(5)Cl5 square pyramid,  a cornercorner with one Zr(6)Cl5 square pyramid,  an edgeedge with one K(2)Cl12 cuboctahedra, and  a faceface with one K(1)Cl12 cuboctahedra. The corner-sharing octahedral tilt angles are 45°. There are eighteen inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 2-coordinate geometry to one K(2), one Zr(1), and one Zr(2) atom. In the second Cl site, Cl(2) is bonded in a 2-coordinate geometry to one K(2), one Zr(1), and one Zr(3) atom. In the third Cl site, Cl(3) is bonded in a 2-coordinate geometry to one K(2), one Zr(1), and one Zr(4) atom. In the fourth Cl site, Cl(4) is bonded in a 2-coordinate geometry to one K(1), one Zr(1), and one Zr(5) atom. In the fifth Cl site, Cl(5) is bonded in a 2-coordinate geometry to one K(1), one Zr(1), and one Zr(6) atom. In the sixth Cl site, Cl(6) is bonded in a 2-coordinate geometry to one K(1), one Zr(1), and one Zr(7) atom. In the seventh Cl site, Cl(7) is bonded in a 3-coordinate geometry to one K(2), one Zr(3), and one Zr(7) atom. In the eighth Cl site, Cl(8) is bonded in a 3-coordinate geometry to one K(2), one Zr(4), and one Zr(5) atom. In the ninth Cl site, Cl(9) is bonded in a 3-coordinate geometry to one K(2), one Zr(2), and one Zr(6) atom. In the tenth Cl site, Cl(10) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Zr(5), and one Zr(7) atom. In the eleventh Cl site, Cl(11) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Zr(6), and one Zr(7) atom. In the twelfth Cl site, Cl(12) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Zr(5), and one Zr(6) atom. In the thirteenth Cl site, Cl(13) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Zr(2), and one Zr(4) atom. In the fourteenth Cl site, Cl(14) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Zr(3), and one Zr(4) atom. In the fifteenth Cl site, Cl(15) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Zr(2), and one Zr(3) atom. In the sixteenth Cl site, Cl(16) is bonded in a 3-coordinate geometry to one K(1), one Zr(3), and one Zr(5) atom. In the seventeenth Cl site, Cl(17) is bonded in a 3-coordinate geometry to one K(1), one Zr(2), and one Zr(7) atom. In the eighteenth Cl site, Cl(18) is bonded in a 3-coordinate geometry to one K(1), one Zr(4), and one Zr(6) atom.
K2Zr7Cl18 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded to one Cl(10), one Cl(11), one Cl(12), one Cl(13), one Cl(14), one Cl(15), one Cl(16), one Cl(17), one Cl(18), one Cl(4), one Cl(5), and one Cl(6) atom to form KCl12 cuboctahedra that share corners with three equivalent Zr(1)Cl6 octahedra,  a cornercorner with one Zr(2)Cl5 square pyramid,  a cornercorner with one Zr(3)Cl5 square pyramid,  a cornercorner with one Zr(4)Cl5 square pyramid,  a cornercorner with one Zr(5)Cl5 square pyramid,  a cornercorner with one Zr(6)Cl5 square pyramid,  a cornercorner with one Zr(7)Cl5 square pyramid, edges with three equivalent K(2)Cl12 cuboctahedra,  an edgeedge with one Zr(2)Cl5 square pyramid,  an edgeedge with one Zr(3)Cl5 square pyramid,  an edgeedge with one Zr(4)Cl5 square pyramid,  a faceface with one Zr(5)Cl5 square pyramid,  a faceface with one Zr(6)Cl5 square pyramid, and  a faceface with one Zr(7)Cl5 square pyramid. The corner-sharing octahedral tilt angles range from 46-47°. The K(1)-Cl(10) bond length is 3.62 Å. The K(1)-Cl(11) bond length is 3.63 Å. The K(1)-Cl(12) bond length is 3.61 Å. The K(1)-Cl(13) bond length is 3.57 Å. The K(1)-Cl(14) bond length is 3.55 Å. The K(1)-Cl(15) bond length is 3.56 Å. The K(1)-Cl(16) bond length is 3.50 Å. The K(1)-Cl(17) bond length is 3.54 Å. The K(1)-Cl(18) bond length is 3.52 Å. The K(1)-Cl(4) bond length is 3.70 Å. The K(1)-Cl(5) bond length is 3.70 Å. The K(1)-Cl(6) bond length is 3.72 Å. In the second K site, K(2) is bonded to one Cl(1), one Cl(10), one Cl(11), one Cl(12), one Cl(13), one Cl(14), one Cl(15), one Cl(2), one Cl(3), one Cl(7), one Cl(8), and one Cl(9) atom to form distorted KCl12 cuboctahedra that share corners with three equivalent Zr(1)Cl6 octahedra,  a cornercorner with one Zr(2)Cl5 square pyramid,  a cornercorner with one Zr(3)Cl5 square pyramid,  a cornercorner with one Zr(4)Cl5 square pyramid,  a cornercorner with one Zr(5)Cl5 square pyramid,  a cornercorner with one Zr(6)Cl5 square pyramid,  a cornercorner with one Zr(7)Cl5 square pyramid, edges with three equivalent K(1)Cl12 cuboctahedra,  an edgeedge with one Zr(5)Cl5 square pyramid,  an edgeedge with one Zr(6)Cl5 square pyramid,  an edgeedge with one Zr(7)Cl5 square pyramid,  a faceface with one Zr(2)Cl5 square pyramid,  a faceface with one Zr(3)Cl5 square pyramid, and  a faceface with one Zr(4)Cl5 square pyramid. The corner-sharing octahedral tilt angles range from 46-47°. The K(2)-Cl(1) bond length is 3.70 Å. The K(2)-Cl(10) bond length is 3.53 Å. The K(2)-Cl(11) bond length is 3.51 Å. The K(2)-Cl(12) bond length is 3.53 Å. The K(2)-Cl(13) bond length is 3.59 Å. The K(2)-Cl(14) bond length is 3.59 Å. The K(2)-Cl(15) bond length is 3.57 Å. The K(2)-Cl(2) bond length is 3.72 Å. The K(2)-Cl(3) bond length is 3.71 Å. The K(2)-Cl(7) bond length is 3.49 Å. The K(2)-Cl(8) bond length is 3.49 Å. The K(2)-Cl(9) bond length is 3.47 Å. There are seven inequivalent Zr sites. In the first Zr site, Zr(1) is bonded to one Cl(1), one Cl(2), one Cl(3), one Cl(4), one Cl(5), and one Cl(6) atom to form ZrCl6 octahedra that share corners with three equivalent K(1)Cl12 cuboctahedra, corners with three equivalent K(2)Cl12 cuboctahedra,  a cornercorner with one Zr(2)Cl5 square pyramid,  a cornercorner with one Zr(3)Cl5 square pyramid,  a cornercorner with one Zr(4)Cl5 square pyramid,  a cornercorner with one Zr(5)Cl5 square pyramid,  a cornercorner with one Zr(6)Cl5 square pyramid, and  a cornercorner with one Zr(7)Cl5 square pyramid. The Zr(1)-Cl(1) bond length is 2.50 Å. The Zr(1)-Cl(2) bond length is 2.48 Å. The Zr(1)-Cl(3) bond length is 2.48 Å. The Zr(1)-Cl(4) bond length is 2.49 Å. The Zr(1)-Cl(5) bond length is 2.51 Å. The Zr(1)-Cl(6) bond length is 2.51 Å. In the second Zr site, Zr(2) is bonded to one Cl(1), one Cl(13), one Cl(15), one Cl(17), and one Cl(9) atom to form ZrCl5 square pyramids that share  a cornercorner with one K(1)Cl12 cuboctahedra,  a cornercorner with one K(2)Cl12 cuboctahedra,  a cornercorner with one Zr(1)Cl6 octahedra,  a cornercorner with one Zr(3)Cl5 square pyramid,  a cornercorner with one Zr(4)Cl5 square pyramid,  a cornercorner with one Zr(6)Cl5 square pyramid,  a cornercorner with one Zr(7)Cl5 square pyramid,  an edgeedge with one K(1)Cl12 cuboctahedra, and  a faceface with one K(2)Cl12 cuboctahedra. The corner-sharing octahedral tilt angles are 46°. The Zr(2)-Cl(1) bond length is 2.77 Å. The Zr(2)-Cl(13) bond length is 2.56 Å. The Zr(2)-Cl(15) bond length is 2.56 Å. The Zr(2)-Cl(17) bond length is 2.54 Å. The Zr(2)-Cl(9) bond length is 2.55 Å. In the third Zr site, Zr(3) is bonded to one Cl(14), one Cl(15), one Cl(16), one Cl(2), and one Cl(7) atom to form ZrCl5 square pyramids that share  a cornercorner with one K(1)Cl12 cuboctahedra,  a cornercorner with one K(2)Cl12 cuboctahedra,  a cornercorner with one Zr(1)Cl6 octahedra,  a cornercorner with one Zr(2)Cl5 square pyramid,  a cornercorner with one Zr(4)Cl5 square pyramid,  a cornercorner with one Zr(5)Cl5 square pyramid,  a cornercorner with one Zr(7)Cl5 square pyramid,  an edgeedge with one K(1)Cl12 cuboctahedra, and  a faceface with one K(2)Cl12 cuboctahedra. The corner-sharing octahedral tilt angles are 45°. The Zr(3)-Cl(14) bond length is 2.55 Å. The Zr(3)-Cl(15) bond length is 2.59 Å. The Zr(3)-Cl(16) bond length is 2.55 Å. The Zr(3)-Cl(2) bond length is 2.79 Å. The Zr(3)-Cl(7) bond length is 2.56 Å. In the fourth Zr site, Zr(4) is bonded to one Cl(13), one Cl(14), one Cl(18), one Cl(3), and one Cl(8) atom to form distorted ZrCl5 square pyramids that share  a cornercorner with one K(1)Cl12 cuboctahedra,  a cornercorner with one K(2)Cl12 cuboctahedra,  a cornercorner with one Zr(1)Cl6 octahedra,  a cornercorner with one Zr(2)Cl5 square pyramid,  a cornercorner with one Zr(3)Cl5 square pyramid,  a cornercorner with one Zr(5)Cl5 square pyramid,  a cornercorner with one Zr(6)Cl5 square pyramid,  an edgeedge with one K(1)Cl12 cuboctahedra, and  a faceface with one K(2)Cl12 cuboctahedra. The corner-sharing octahedral tilt angles are 45°. The Zr(4)-Cl(13) bond length is 2.58 Å. The Zr(4)-Cl(14) bond length is 2.57 Å. The Zr(4)-Cl(18) bond length is 2.57 Å. The Zr(4)-Cl(3) bond length is 2.82 Å. The Zr(4)-Cl(8) bond length is 2.54 Å. In the fifth Zr site, Zr(5) is bonded to one Cl(10), one Cl(12), one Cl(16), one Cl(4), and one Cl(8) atom to form distorted ZrCl5 square pyramids that share  a cornercorner with one K(1)Cl12 cuboctahedra,  a cornercorner with one K(2)Cl12 cuboctahedra,  a cornercorner with one Zr(1)Cl6 octahedra,  a cornercorner with one Zr(3)Cl5 square pyramid,  a cornercorner with one Zr(4)Cl5 square pyramid,  a cornercorner with one Zr(6)Cl5 square pyramid,  a cornercorner with one Zr(7)Cl5 square pyramid,  an edgeedge with one K(2)Cl12 cuboctahedra, and  a faceface with one K(1)Cl12 cuboctahedra. The corner-sharing octahedral tilt angles are 45°. The Zr(5)-Cl(10) bond length is 2.59 Å. The Zr(5)-Cl(12) bond length is 2.59 Å. The Zr(5)-Cl(16) bond length is 2.54 Å. The Zr(5)-Cl(4) bond length is 2.80 Å. The Zr(5)-Cl(8) bond length is 2.54 Å. In the sixth Zr site, Zr(6) is bonded to one Cl(11), one Cl(12), one Cl(18), one Cl(5), and one Cl(9) atom to form ZrCl5 square pyramids that share  a cornercorner with one K(1)Cl12 cuboctahedra,  a cornercorner with one K(2)Cl12 cuboctahedra,  a cornercorner with one Zr(1)Cl6 octahedra,  a cornercorner with one Zr(2)Cl5 square pyramid,  a cornercorner with one Zr(4)Cl5 square pyramid,  a cornercorner with one Zr(5)Cl5 square pyramid,  a cornercorner with one Zr(7)Cl5 square pyramid,  an edgeedge with one K(2)Cl12 cuboctahedra, and  a faceface with one K(1)Cl12 cuboctahedra. The corner-sharing octahedral tilt angles are 46°. The Zr(6)-Cl(11) bond length is 2.56 Å. The Zr(6)-Cl(12) bond length is 2.57 Å. The Zr(6)-Cl(18) bond length is 2.54 Å. The Zr(6)-Cl(5) bond length is 2.77 Å. The Zr(6)-Cl(9) bond length is 2.55 Å. In the seventh Zr site, Zr(7) is bonded to one Cl(10), one Cl(11), one Cl(17), one Cl(6), and one Cl(7) atom to form ZrCl5 square pyramids that share  a cornercorner with one K(1)Cl12 cuboctahedra,  a cornercorner with one K(2)Cl12 cuboctahedra,  a cornercorner with one Zr(1)Cl6 octahedra,  a cornercorner with one Zr(2)Cl5 square pyramid,  a cornercorner with one Zr(3)Cl5 square pyramid,  a cornercorner with one Zr(5)Cl5 square pyramid,  a cornercorner with one Zr(6)Cl5 square pyramid,  an edgeedge with one K(2)Cl12 cuboctahedra, and  a faceface with one K(1)Cl12 cuboctahedra. The corner-sharing octahedral tilt angles are 45°. The Zr(7)-Cl(10) bond length is 2.56 Å. The Zr(7)-Cl(11) bond length is 2.57 Å. The Zr(7)-Cl(17) bond length is 2.55 Å. The Zr(7)-Cl(6) bond length is 2.78 Å. The Zr(7)-Cl(7) bond length is 2.54 Å. There are eighteen inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 2-coordinate geometry to one K(2), one Zr(1), and one Zr(2) atom. In the second Cl site, Cl(2) is bonded in a 2-coordinate geometry to one K(2), one Zr(1), and one Zr(3) atom. In the third Cl site, Cl(3) is bonded in a 2-coordinate geometry to one K(2), one Zr(1), and one Zr(4) atom. In the fourth Cl site, Cl(4) is bonded in a 2-coordinate geometry to one K(1), one Zr(1), and one Zr(5) atom. In the fifth Cl site, Cl(5) is bonded in a 2-coordinate geometry to one K(1), one Zr(1), and one Zr(6) atom. In the sixth Cl site, Cl(6) is bonded in a 2-coordinate geometry to one K(1), one Zr(1), and one Zr(7) atom. In the seventh Cl site, Cl(7) is bonded in a 3-coordinate geometry to one K(2), one Zr(3), and one Zr(7) atom. In the eighth Cl site, Cl(8) is bonded in a 3-coordinate geometry to one K(2), one Zr(4), and one Zr(5) atom. In the ninth Cl site, Cl(9) is bonded in a 3-coordinate geometry to one K(2), one Zr(2), and one Zr(6) atom. In the tenth Cl site, Cl(10) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Zr(5), and one Zr(7) atom. In the eleventh Cl site, Cl(11) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Zr(6), and one Zr(7) atom. In the twelfth Cl site, Cl(12) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Zr(5), and one Zr(6) atom. In the thirteenth Cl site, Cl(13) is bonded in a 2-coordinate geometry to one K(1), one K(2), one Zr(2), and one Zr(4) atom. In the fourteenth Cl site, Cl(14) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Zr(3), and one Zr(4) atom. In the fifteenth Cl site, Cl(15) is bonded in a 4-coordinate geometry to one K(1), one K(2), one Zr(2), and one Zr(3) atom. In the sixteenth Cl site, Cl(16) is bonded in a 3-coordinate geometry to one K(1), one Zr(3), and one Zr(5) atom. In the seventeenth Cl site, Cl(17) is bonded in a 3-coordinate geometry to one K(1), one Zr(2), and one Zr(7) atom. In the eighteenth Cl site, Cl(18) is bonded in a 3-coordinate geometry to one K(1), one Zr(4), and one Zr(6) atom.