Cd2GeAs4 is Chalcostibite-like structured and crystallizes in the orthorhombic Pnma space group. Cd(1) is bonded in a 4-coordinate geometry to two equivalent As(1) and two equivalent As(2) atoms. Ge(1) is bonded to one As(1), one As(3), and two equivalent As(2) atoms to form GeAs4 tetrahedra that share corners with two equivalent As(2)Cd2GeAs tetrahedra. There are three inequivalent As sites. In the first As site, As(1) is bonded to four equivalent Cd(1) and one Ge(1) atom to form distorted AsCd4Ge trigonal bipyramids that share corners with ten equivalent As(2)Cd2GeAs tetrahedra and edges with two equivalent As(1)Cd4Ge trigonal bipyramids. In the second As site, As(2) is bonded to two equivalent Cd(1), one Ge(1), and one As(3) atom to form distorted AsCd2GeAs tetrahedra that share  a cornercorner with one Ge(1)As4 tetrahedra, corners with four equivalent As(2)Cd2GeAs tetrahedra, and corners with five equivalent As(1)Cd4Ge trigonal bipyramids. In the third As site, As(3) is bonded in a 3-coordinate geometry to one Ge(1) and two equivalent As(2) atoms.
Cd2GeAs4 is Chalcostibite-like structured and crystallizes in the orthorhombic Pnma space group. Cd(1) is bonded in a 4-coordinate geometry to two equivalent As(1) and two equivalent As(2) atoms. There is one shorter (2.75 Å) and one longer (2.77 Å) Cd(1)-As(1) bond length. There is one shorter (2.72 Å) and one longer (2.73 Å) Cd(1)-As(2) bond length. Ge(1) is bonded to one As(1), one As(3), and two equivalent As(2) atoms to form GeAs4 tetrahedra that share corners with two equivalent As(2)Cd2GeAs tetrahedra. The Ge(1)-As(1) bond length is 2.47 Å. The Ge(1)-As(3) bond length is 2.50 Å. Both Ge(1)-As(2) bond lengths are 2.50 Å. There are three inequivalent As sites. In the first As site, As(1) is bonded to four equivalent Cd(1) and one Ge(1) atom to form distorted AsCd4Ge trigonal bipyramids that share corners with ten equivalent As(2)Cd2GeAs tetrahedra and edges with two equivalent As(1)Cd4Ge trigonal bipyramids. In the second As site, As(2) is bonded to two equivalent Cd(1), one Ge(1), and one As(3) atom to form distorted AsCd2GeAs tetrahedra that share  a cornercorner with one Ge(1)As4 tetrahedra, corners with four equivalent As(2)Cd2GeAs tetrahedra, and corners with five equivalent As(1)Cd4Ge trigonal bipyramids. The As(2)-As(3) bond length is 2.48 Å. In the third As site, As(3) is bonded in a 3-coordinate geometry to one Ge(1) and two equivalent As(2) atoms.