Sr2SiO3Cl2 crystallizes in the tetragonal I4/m space group. Sr(1) is bonded in a 7-coordinate geometry to one O(1), three equivalent O(2), one Cl(1), one Cl(2), and one Cl(3) atom. Si(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form corner-sharing SiO4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to two equivalent Sr(1) and two equivalent Si(1) atoms. In the second O site, O(2) is bonded to three equivalent Sr(1) and one Si(1) atom to form a mixture of distorted corner and edge-sharing OSr3Si tetrahedra. There are three inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 2-coordinate geometry to two equivalent Sr(1) atoms. In the second Cl site, Cl(2) is bonded in a square co-planar geometry to four equivalent Sr(1) atoms. In the third Cl site, Cl(3) is bonded in a rectangular see-saw-like geometry to four equivalent Sr(1) atoms.
Sr2SiO3Cl2 crystallizes in the tetragonal I4/m space group. Sr(1) is bonded in a 7-coordinate geometry to one O(1), three equivalent O(2), one Cl(1), one Cl(2), and one Cl(3) atom. The Sr(1)-O(1) bond length is 2.81 Å. There are a spread of Sr(1)-O(2) bond distances ranging from 2.52-2.67 Å. The Sr(1)-Cl(1) bond length is 3.00 Å. The Sr(1)-Cl(2) bond length is 2.99 Å. The Sr(1)-Cl(3) bond length is 2.97 Å. Si(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form corner-sharing SiO4 tetrahedra. Both Si(1)-O(1) bond lengths are 1.67 Å. Both Si(1)-O(2) bond lengths are 1.62 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to two equivalent Sr(1) and two equivalent Si(1) atoms. In the second O site, O(2) is bonded to three equivalent Sr(1) and one Si(1) atom to form a mixture of distorted corner and edge-sharing OSr3Si tetrahedra. There are three inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 2-coordinate geometry to two equivalent Sr(1) atoms. In the second Cl site, Cl(2) is bonded in a square co-planar geometry to four equivalent Sr(1) atoms. In the third Cl site, Cl(3) is bonded in a rectangular see-saw-like geometry to four equivalent Sr(1) atoms.