Cd2As3Br crystallizes in the monoclinic C2/c space group. Cd(1) is bonded to one As(2), two equivalent As(1), and one Br(1) atom to form distorted CdAs3Br trigonal pyramids that share corners with two equivalent As(2)Cd2As2 tetrahedra, corners with four equivalent Cd(1)As3Br trigonal pyramids, and corners with four equivalent As(1)Cd2As2 trigonal pyramids. There are two inequivalent As sites. In the first As site, As(1) is bonded to two equivalent Cd(1), one As(1), and one As(2) atom to form distorted AsCd2As2 trigonal pyramids that share corners with three equivalent As(2)Cd2As2 tetrahedra, corners with three equivalent As(1)Cd2As2 trigonal pyramids, and corners with four equivalent Cd(1)As3Br trigonal pyramids. In the second As site, As(2) is bonded to two equivalent Cd(1) and two equivalent As(1) atoms to form distorted AsCd2As2 tetrahedra that share corners with four equivalent Cd(1)As3Br trigonal pyramids and corners with six equivalent As(1)Cd2As2 trigonal pyramids. Br(1) is bonded in an L-shaped geometry to two equivalent Cd(1) atoms.
Cd2As3Br crystallizes in the monoclinic C2/c space group. Cd(1) is bonded to one As(2), two equivalent As(1), and one Br(1) atom to form distorted CdAs3Br trigonal pyramids that share corners with two equivalent As(2)Cd2As2 tetrahedra, corners with four equivalent Cd(1)As3Br trigonal pyramids, and corners with four equivalent As(1)Cd2As2 trigonal pyramids. The Cd(1)-As(2) bond length is 2.64 Å. There is one shorter (2.65 Å) and one longer (2.75 Å) Cd(1)-As(1) bond length. The Cd(1)-Br(1) bond length is 2.82 Å. There are two inequivalent As sites. In the first As site, As(1) is bonded to two equivalent Cd(1), one As(1), and one As(2) atom to form distorted AsCd2As2 trigonal pyramids that share corners with three equivalent As(2)Cd2As2 tetrahedra, corners with three equivalent As(1)Cd2As2 trigonal pyramids, and corners with four equivalent Cd(1)As3Br trigonal pyramids. The As(1)-As(1) bond length is 2.42 Å. The As(1)-As(2) bond length is 2.44 Å. In the second As site, As(2) is bonded to two equivalent Cd(1) and two equivalent As(1) atoms to form distorted AsCd2As2 tetrahedra that share corners with four equivalent Cd(1)As3Br trigonal pyramids and corners with six equivalent As(1)Cd2As2 trigonal pyramids. Br(1) is bonded in an L-shaped geometry to two equivalent Cd(1) atoms.