K2UTe3 is Caswellsilverite-like structured and crystallizes in the monoclinic C2/m space group. There are three inequivalent K sites. In the first K site, K(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form distorted KTe6 octahedra that share corners with two equivalent K(3)Te6 octahedra, corners with four equivalent U(1)Te6 octahedra, edges with two equivalent K(3)Te6 octahedra, edges with three equivalent K(1)Te6 octahedra, edges with three equivalent K(2)Te6 octahedra, and edges with four equivalent U(1)Te6 octahedra. The corner-sharing octahedral tilt angles are 12°. In the second K site, K(2) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form distorted KTe6 octahedra that share corners with two equivalent K(3)Te6 octahedra, corners with four equivalent U(1)Te6 octahedra, edges with two equivalent K(3)Te6 octahedra, edges with four equivalent U(1)Te6 octahedra, and edges with six equivalent K(1)Te6 octahedra. The corner-sharing octahedral tilt angles range from 10-14°. In the third K site, K(3) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form KTe6 octahedra that share corners with two equivalent K(2)Te6 octahedra, corners with four equivalent K(1)Te6 octahedra, edges with two equivalent K(2)Te6 octahedra, edges with four equivalent K(1)Te6 octahedra, and edges with six equivalent U(1)Te6 octahedra. The corner-sharing octahedral tilt angles range from 12-14°. U(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form UTe6 octahedra that share corners with two equivalent K(2)Te6 octahedra, corners with four equivalent K(1)Te6 octahedra, edges with two equivalent K(2)Te6 octahedra, edges with three equivalent K(3)Te6 octahedra, edges with three equivalent U(1)Te6 octahedra, and edges with four equivalent K(1)Te6 octahedra. The corner-sharing octahedral tilt angles range from 10-12°. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one K(2), one K(3), two equivalent K(1), and two equivalent U(1) atoms to form a mixture of corner and edge-sharing TeK4U2 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the second Te site, Te(2) is bonded to one K(2), one K(3), two equivalent K(1), and two equivalent U(1) atoms to form a mixture of corner and edge-sharing TeK4U2 octahedra. The corner-sharing octahedral tilt angles range from 0-14°.
K2UTe3 is Caswellsilverite-like structured and crystallizes in the monoclinic C2/m space group. There are three inequivalent K sites. In the first K site, K(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form distorted KTe6 octahedra that share corners with two equivalent K(3)Te6 octahedra, corners with four equivalent U(1)Te6 octahedra, edges with two equivalent K(3)Te6 octahedra, edges with three equivalent K(1)Te6 octahedra, edges with three equivalent K(2)Te6 octahedra, and edges with four equivalent U(1)Te6 octahedra. The corner-sharing octahedral tilt angles are 12°. Both K(1)-Te(1) bond lengths are 3.57 Å. There are two shorter (3.43 Å) and two longer (3.71 Å) K(1)-Te(2) bond lengths. In the second K site, K(2) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form distorted KTe6 octahedra that share corners with two equivalent K(3)Te6 octahedra, corners with four equivalent U(1)Te6 octahedra, edges with two equivalent K(3)Te6 octahedra, edges with four equivalent U(1)Te6 octahedra, and edges with six equivalent K(1)Te6 octahedra. The corner-sharing octahedral tilt angles range from 10-14°. Both K(2)-Te(1) bond lengths are 3.37 Å. All K(2)-Te(2) bond lengths are 3.67 Å. In the third K site, K(3) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form KTe6 octahedra that share corners with two equivalent K(2)Te6 octahedra, corners with four equivalent K(1)Te6 octahedra, edges with two equivalent K(2)Te6 octahedra, edges with four equivalent K(1)Te6 octahedra, and edges with six equivalent U(1)Te6 octahedra. The corner-sharing octahedral tilt angles range from 12-14°. Both K(3)-Te(1) bond lengths are 3.45 Å. All K(3)-Te(2) bond lengths are 3.48 Å. U(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form UTe6 octahedra that share corners with two equivalent K(2)Te6 octahedra, corners with four equivalent K(1)Te6 octahedra, edges with two equivalent K(2)Te6 octahedra, edges with three equivalent K(3)Te6 octahedra, edges with three equivalent U(1)Te6 octahedra, and edges with four equivalent K(1)Te6 octahedra. The corner-sharing octahedral tilt angles range from 10-12°. Both U(1)-Te(1) bond lengths are 3.10 Å. There are two shorter (3.09 Å) and two longer (3.10 Å) U(1)-Te(2) bond lengths. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one K(2), one K(3), two equivalent K(1), and two equivalent U(1) atoms to form a mixture of corner and edge-sharing TeK4U2 octahedra. The corner-sharing octahedral tilt angles range from 0-10°. In the second Te site, Te(2) is bonded to one K(2), one K(3), two equivalent K(1), and two equivalent U(1) atoms to form a mixture of corner and edge-sharing TeK4U2 octahedra. The corner-sharing octahedral tilt angles range from 0-14°.