SrMn2P2 crystallizes in the trigonal P-3m1 space group. Sr(1) is bonded to six equivalent P(1) atoms to form distorted SrP6 octahedra that share corners with twelve equivalent Mn(1)P4 tetrahedra, edges with six equivalent Sr(1)P6 octahedra, and edges with six equivalent Mn(1)P4 tetrahedra. Mn(1) is bonded to four equivalent P(1) atoms to form MnP4 tetrahedra that share corners with six equivalent Sr(1)P6 octahedra, corners with six equivalent Mn(1)P4 tetrahedra, edges with three equivalent Sr(1)P6 octahedra, and edges with three equivalent Mn(1)P4 tetrahedra. The corner-sharing octahedral tilt angles range from 27-47°. P(1) is bonded in a 7-coordinate geometry to three equivalent Sr(1) and four equivalent Mn(1) atoms.
SrMn2P2 crystallizes in the trigonal P-3m1 space group. Sr(1) is bonded to six equivalent P(1) atoms to form distorted SrP6 octahedra that share corners with twelve equivalent Mn(1)P4 tetrahedra, edges with six equivalent Sr(1)P6 octahedra, and edges with six equivalent Mn(1)P4 tetrahedra. All Sr(1)-P(1) bond lengths are 3.06 Å. Mn(1) is bonded to four equivalent P(1) atoms to form MnP4 tetrahedra that share corners with six equivalent Sr(1)P6 octahedra, corners with six equivalent Mn(1)P4 tetrahedra, edges with three equivalent Sr(1)P6 octahedra, and edges with three equivalent Mn(1)P4 tetrahedra. The corner-sharing octahedral tilt angles range from 27-47°. There is one shorter (2.27 Å) and three longer (2.32 Å) Mn(1)-P(1) bond lengths. P(1) is bonded in a 7-coordinate geometry to three equivalent Sr(1) and four equivalent Mn(1) atoms.