SrMn2As2 crystallizes in the trigonal P-3m1 space group. Sr(1) is bonded to six equivalent As(1) atoms to form distorted SrAs6 octahedra that share corners with twelve equivalent Mn(1)As4 tetrahedra, edges with six equivalent Sr(1)As6 octahedra, and edges with six equivalent Mn(1)As4 tetrahedra. Mn(1) is bonded to four equivalent As(1) atoms to form MnAs4 tetrahedra that share corners with six equivalent Sr(1)As6 octahedra, corners with six equivalent Mn(1)As4 tetrahedra, edges with three equivalent Sr(1)As6 octahedra, and edges with three equivalent Mn(1)As4 tetrahedra. The corner-sharing octahedral tilt angles range from 23-49°. As(1) is bonded in a 7-coordinate geometry to three equivalent Sr(1) and four equivalent Mn(1) atoms.
SrMn2As2 crystallizes in the trigonal P-3m1 space group. Sr(1) is bonded to six equivalent As(1) atoms to form distorted SrAs6 octahedra that share corners with twelve equivalent Mn(1)As4 tetrahedra, edges with six equivalent Sr(1)As6 octahedra, and edges with six equivalent Mn(1)As4 tetrahedra. All Sr(1)-As(1) bond lengths are 3.14 Å. Mn(1) is bonded to four equivalent As(1) atoms to form MnAs4 tetrahedra that share corners with six equivalent Sr(1)As6 octahedra, corners with six equivalent Mn(1)As4 tetrahedra, edges with three equivalent Sr(1)As6 octahedra, and edges with three equivalent Mn(1)As4 tetrahedra. The corner-sharing octahedral tilt angles range from 23-49°. There is one shorter (2.43 Å) and three longer (2.48 Å) Mn(1)-As(1) bond lengths. As(1) is bonded in a 7-coordinate geometry to three equivalent Sr(1) and four equivalent Mn(1) atoms.