Sc3P is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sc sites. In the first Sc site, Sc(1) is bonded to four equivalent Sc(1), four equivalent Sc(2), and four equivalent P(1) atoms to form distorted ScSc8P4 cuboctahedra that share corners with twelve equivalent Sc(1)Sc8P4 cuboctahedra, edges with eight equivalent Sc(1)Sc8P4 cuboctahedra, edges with eight equivalent P(1)Sc12 cuboctahedra, faces with four equivalent P(1)Sc12 cuboctahedra, and faces with ten equivalent Sc(1)Sc8P4 cuboctahedra. In the second Sc site, Sc(2) is bonded in a square co-planar geometry to eight equivalent Sc(1) and four equivalent P(1) atoms. P(1) is bonded to four equivalent Sc(2) and eight equivalent Sc(1) atoms to form PSc12 cuboctahedra that share corners with four equivalent P(1)Sc12 cuboctahedra, edges with eight equivalent P(1)Sc12 cuboctahedra, edges with sixteen equivalent Sc(1)Sc8P4 cuboctahedra, faces with four equivalent P(1)Sc12 cuboctahedra, and faces with eight equivalent Sc(1)Sc8P4 cuboctahedra.
Sc3P is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sc sites. In the first Sc site, Sc(1) is bonded to four equivalent Sc(1), four equivalent Sc(2), and four equivalent P(1) atoms to form distorted ScSc8P4 cuboctahedra that share corners with twelve equivalent Sc(1)Sc8P4 cuboctahedra, edges with eight equivalent Sc(1)Sc8P4 cuboctahedra, edges with eight equivalent P(1)Sc12 cuboctahedra, faces with four equivalent P(1)Sc12 cuboctahedra, and faces with ten equivalent Sc(1)Sc8P4 cuboctahedra. All Sc(1)-Sc(1) bond lengths are 2.88 Å. All Sc(1)-Sc(2) bond lengths are 3.12 Å. All Sc(1)-P(1) bond lengths are 3.12 Å. In the second Sc site, Sc(2) is bonded in a square co-planar geometry to eight equivalent Sc(1) and four equivalent P(1) atoms. All Sc(2)-P(1) bond lengths are 2.88 Å. P(1) is bonded to four equivalent Sc(2) and eight equivalent Sc(1) atoms to form PSc12 cuboctahedra that share corners with four equivalent P(1)Sc12 cuboctahedra, edges with eight equivalent P(1)Sc12 cuboctahedra, edges with sixteen equivalent Sc(1)Sc8P4 cuboctahedra, faces with four equivalent P(1)Sc12 cuboctahedra, and faces with eight equivalent Sc(1)Sc8P4 cuboctahedra.