UCu2P2 crystallizes in the trigonal P-3m1 space group. U(1) is bonded to six equivalent P(1) atoms to form UP6 octahedra that share corners with twelve equivalent Cu(1)P4 tetrahedra, edges with six equivalent U(1)P6 octahedra, and edges with six equivalent Cu(1)P4 tetrahedra. Cu(1) is bonded to four equivalent P(1) atoms to form CuP4 tetrahedra that share corners with six equivalent U(1)P6 octahedra, corners with six equivalent Cu(1)P4 tetrahedra, edges with three equivalent U(1)P6 octahedra, and edges with three equivalent Cu(1)P4 tetrahedra. The corner-sharing octahedral tilt angles range from 19-53°. P(1) is bonded to three equivalent U(1) and four equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing PU3Cu4 pentagonal bipyramids.
UCu2P2 crystallizes in the trigonal P-3m1 space group. U(1) is bonded to six equivalent P(1) atoms to form UP6 octahedra that share corners with twelve equivalent Cu(1)P4 tetrahedra, edges with six equivalent U(1)P6 octahedra, and edges with six equivalent Cu(1)P4 tetrahedra. All U(1)-P(1) bond lengths are 2.80 Å. Cu(1) is bonded to four equivalent P(1) atoms to form CuP4 tetrahedra that share corners with six equivalent U(1)P6 octahedra, corners with six equivalent Cu(1)P4 tetrahedra, edges with three equivalent U(1)P6 octahedra, and edges with three equivalent Cu(1)P4 tetrahedra. The corner-sharing octahedral tilt angles range from 19-53°. There are three shorter (2.36 Å) and one longer (2.37 Å) Cu(1)-P(1) bond length. P(1) is bonded to three equivalent U(1) and four equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing PU3Cu4 pentagonal bipyramids.