Eu(ZnAs)2 crystallizes in the trigonal P-3m1 space group. Eu(1) is bonded to six equivalent As(1) atoms to form EuAs6 octahedra that share corners with twelve equivalent Zn(1)As4 tetrahedra, edges with six equivalent Eu(1)As6 octahedra, and edges with six equivalent Zn(1)As4 tetrahedra. Zn(1) is bonded to four equivalent As(1) atoms to form ZnAs4 tetrahedra that share corners with six equivalent Eu(1)As6 octahedra, corners with six equivalent Zn(1)As4 tetrahedra, edges with three equivalent Eu(1)As6 octahedra, and edges with three equivalent Zn(1)As4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-52°. As(1) is bonded to three equivalent Eu(1) and four equivalent Zn(1) atoms to form a mixture of distorted corner and edge-sharing AsEu3Zn4 pentagonal bipyramids.
Eu(ZnAs)2 crystallizes in the trigonal P-3m1 space group. Eu(1) is bonded to six equivalent As(1) atoms to form EuAs6 octahedra that share corners with twelve equivalent Zn(1)As4 tetrahedra, edges with six equivalent Eu(1)As6 octahedra, and edges with six equivalent Zn(1)As4 tetrahedra. All Eu(1)-As(1) bond lengths are 3.08 Å. Zn(1) is bonded to four equivalent As(1) atoms to form ZnAs4 tetrahedra that share corners with six equivalent Eu(1)As6 octahedra, corners with six equivalent Zn(1)As4 tetrahedra, edges with three equivalent Eu(1)As6 octahedra, and edges with three equivalent Zn(1)As4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-52°. There are three shorter (2.53 Å) and one longer (2.59 Å) Zn(1)-As(1) bond length. As(1) is bonded to three equivalent Eu(1) and four equivalent Zn(1) atoms to form a mixture of distorted corner and edge-sharing AsEu3Zn4 pentagonal bipyramids.