CdP4 crystallizes in the monoclinic P2_1/c space group. Cd(1) is bonded to two equivalent P(1) and four equivalent P(2) atoms to form CdP6 octahedra that share corners with four equivalent Cd(1)P6 octahedra, corners with four equivalent P(2)Cd2P2 tetrahedra, and corners with ten equivalent P(1)CdP3 tetrahedra. The corner-sharing octahedral tilt angles are 63°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one Cd(1), one P(1), and two equivalent P(2) atoms to form PCdP3 tetrahedra that share corners with five equivalent Cd(1)P6 octahedra, corners with three equivalent P(1)CdP3 tetrahedra, and corners with six equivalent P(2)Cd2P2 tetrahedra. The corner-sharing octahedral tilt angles range from 58-78°. In the second P site, P(2) is bonded to two equivalent Cd(1) and two equivalent P(1) atoms to form PCd2P2 tetrahedra that share corners with two equivalent Cd(1)P6 octahedra, corners with six equivalent P(1)CdP3 tetrahedra, and corners with eight equivalent P(2)Cd2P2 tetrahedra. The corner-sharing octahedral tilt angles range from 68-72°.
CdP4 crystallizes in the monoclinic P2_1/c space group. Cd(1) is bonded to two equivalent P(1) and four equivalent P(2) atoms to form CdP6 octahedra that share corners with four equivalent Cd(1)P6 octahedra, corners with four equivalent P(2)Cd2P2 tetrahedra, and corners with ten equivalent P(1)CdP3 tetrahedra. The corner-sharing octahedral tilt angles are 63°. Both Cd(1)-P(1) bond lengths are 2.97 Å. There are two shorter (2.65 Å) and two longer (2.75 Å) Cd(1)-P(2) bond lengths. There are two inequivalent P sites. In the first P site, P(1) is bonded to one Cd(1), one P(1), and two equivalent P(2) atoms to form PCdP3 tetrahedra that share corners with five equivalent Cd(1)P6 octahedra, corners with three equivalent P(1)CdP3 tetrahedra, and corners with six equivalent P(2)Cd2P2 tetrahedra. The corner-sharing octahedral tilt angles range from 58-78°. The P(1)-P(1) bond length is 2.26 Å. Both P(1)-P(2) bond lengths are 2.18 Å. In the second P site, P(2) is bonded to two equivalent Cd(1) and two equivalent P(1) atoms to form PCd2P2 tetrahedra that share corners with two equivalent Cd(1)P6 octahedra, corners with six equivalent P(1)CdP3 tetrahedra, and corners with eight equivalent P(2)Cd2P2 tetrahedra. The corner-sharing octahedral tilt angles range from 68-72°.