K2Sr2O3 is Aluminum carbonitride-like structured and crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. Sr(1) is bonded to one O(1) and three equivalent O(2) atoms to form a mixture of corner and edge-sharing SrO4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent K(1) and two equivalent Sr(1) atoms to form corner-sharing OK4Sr2 octahedra. The corner-sharing octahedral tilt angles are 53°. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent K(1) and three equivalent Sr(1) atoms.
K2Sr2O3 is Aluminum carbonitride-like structured and crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. There is one shorter (2.82 Å) and one longer (2.83 Å) K(1)-O(1) bond length. There is one shorter (2.70 Å) and one longer (3.11 Å) K(1)-O(2) bond length. Sr(1) is bonded to one O(1) and three equivalent O(2) atoms to form a mixture of corner and edge-sharing SrO4 tetrahedra. The Sr(1)-O(1) bond length is 2.38 Å. There are a spread of Sr(1)-O(2) bond distances ranging from 2.41-2.47 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent K(1) and two equivalent Sr(1) atoms to form corner-sharing OK4Sr2 octahedra. The corner-sharing octahedral tilt angles are 53°. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent K(1) and three equivalent Sr(1) atoms.