Th(CuP)2 crystallizes in the trigonal P-3m1 space group. Th(1) is bonded to six equivalent P(1) atoms to form distorted ThP6 octahedra that share corners with twelve equivalent Cu(1)P4 tetrahedra, edges with six equivalent Th(1)P6 octahedra, and edges with six equivalent Cu(1)P4 tetrahedra. Cu(1) is bonded to four equivalent P(1) atoms to form distorted CuP4 tetrahedra that share corners with six equivalent Th(1)P6 octahedra, corners with six equivalent Cu(1)P4 tetrahedra, edges with three equivalent Th(1)P6 octahedra, and edges with three equivalent Cu(1)P4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-53°. P(1) is bonded to three equivalent Th(1) and four equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing PTh3Cu4 pentagonal bipyramids.
Th(CuP)2 crystallizes in the trigonal P-3m1 space group. Th(1) is bonded to six equivalent P(1) atoms to form distorted ThP6 octahedra that share corners with twelve equivalent Cu(1)P4 tetrahedra, edges with six equivalent Th(1)P6 octahedra, and edges with six equivalent Cu(1)P4 tetrahedra. All Th(1)-P(1) bond lengths are 2.90 Å. Cu(1) is bonded to four equivalent P(1) atoms to form distorted CuP4 tetrahedra that share corners with six equivalent Th(1)P6 octahedra, corners with six equivalent Cu(1)P4 tetrahedra, edges with three equivalent Th(1)P6 octahedra, and edges with three equivalent Cu(1)P4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-53°. There is one shorter (2.38 Å) and three longer (2.40 Å) Cu(1)-P(1) bond lengths. P(1) is bonded to three equivalent Th(1) and four equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing PTh3Cu4 pentagonal bipyramids.