Sr2CuO2Cl crystallizes in the trigonal P3_121 space group. Sr(1) is bonded in a 6-coordinate geometry to three equivalent O(1) and three equivalent Cl(1) atoms. Cu(1) is bonded in a linear geometry to two equivalent O(1) atoms. O(1) is bonded to three equivalent Sr(1) and one Cu(1) atom to form OSr3Cu tetrahedra that share corners with three equivalent Cl(1)Sr6 octahedra, corners with seven equivalent O(1)Sr3Cu tetrahedra, and edges with three equivalent Cl(1)Sr6 octahedra. The corner-sharing octahedral tilt angles range from 26-27°. Cl(1) is bonded to six equivalent Sr(1) atoms to form ClSr6 octahedra that share corners with six equivalent O(1)Sr3Cu tetrahedra, edges with six equivalent Cl(1)Sr6 octahedra, and edges with six equivalent O(1)Sr3Cu tetrahedra.
Sr2CuO2Cl crystallizes in the trigonal P3_121 space group. Sr(1) is bonded in a 6-coordinate geometry to three equivalent O(1) and three equivalent Cl(1) atoms. There are two shorter (2.42 Å) and one longer (2.43 Å) Sr(1)-O(1) bond length. There are a spread of Sr(1)-Cl(1) bond distances ranging from 3.15-3.19 Å. Cu(1) is bonded in a linear geometry to two equivalent O(1) atoms. Both Cu(1)-O(1) bond lengths are 1.82 Å. O(1) is bonded to three equivalent Sr(1) and one Cu(1) atom to form OSr3Cu tetrahedra that share corners with three equivalent Cl(1)Sr6 octahedra, corners with seven equivalent O(1)Sr3Cu tetrahedra, and edges with three equivalent Cl(1)Sr6 octahedra. The corner-sharing octahedral tilt angles range from 26-27°. Cl(1) is bonded to six equivalent Sr(1) atoms to form ClSr6 octahedra that share corners with six equivalent O(1)Sr3Cu tetrahedra, edges with six equivalent Cl(1)Sr6 octahedra, and edges with six equivalent O(1)Sr3Cu tetrahedra.