SrZnO2 crystallizes in the orthorhombic Pnma space group. Sr(1) is bonded to three equivalent O(1) and four equivalent O(2) atoms to form distorted SrO7 pentagonal bipyramids that share corners with four equivalent Sr(1)O7 pentagonal bipyramids, corners with four equivalent Zn(1)O4 tetrahedra, edges with four equivalent Sr(1)O7 pentagonal bipyramids, edges with five equivalent Zn(1)O4 tetrahedra, and faces with two equivalent Sr(1)O7 pentagonal bipyramids. Zn(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form ZnO4 tetrahedra that share corners with four equivalent Sr(1)O7 pentagonal bipyramids, corners with four equivalent Zn(1)O4 tetrahedra, and edges with five equivalent Sr(1)O7 pentagonal bipyramids. There are two inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Sr(1) and two equivalent Zn(1) atoms to form distorted OSr3Zn2 square pyramids that share corners with eight equivalent O(2)Sr4Zn2 octahedra, edges with four equivalent O(2)Sr4Zn2 octahedra, and edges with four equivalent O(1)Sr3Zn2 square pyramids. The corner-sharing octahedral tilt angles range from 27-62°. In the second O site, O(2) is bonded to four equivalent Sr(1) and two equivalent Zn(1) atoms to form OSr4Zn2 octahedra that share corners with four equivalent O(2)Sr4Zn2 octahedra, corners with eight equivalent O(1)Sr3Zn2 square pyramids, edges with two equivalent O(2)Sr4Zn2 octahedra, edges with four equivalent O(1)Sr3Zn2 square pyramids, and faces with two equivalent O(2)Sr4Zn2 octahedra. The corner-sharing octahedral tilt angles are 62°.
SrZnO2 crystallizes in the orthorhombic Pnma space group. Sr(1) is bonded to three equivalent O(1) and four equivalent O(2) atoms to form distorted SrO7 pentagonal bipyramids that share corners with four equivalent Sr(1)O7 pentagonal bipyramids, corners with four equivalent Zn(1)O4 tetrahedra, edges with four equivalent Sr(1)O7 pentagonal bipyramids, edges with five equivalent Zn(1)O4 tetrahedra, and faces with two equivalent Sr(1)O7 pentagonal bipyramids. There are two shorter (2.59 Å) and one longer (2.69 Å) Sr(1)-O(1) bond length. There are two shorter (2.57 Å) and two longer (2.62 Å) Sr(1)-O(2) bond lengths. Zn(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form ZnO4 tetrahedra that share corners with four equivalent Sr(1)O7 pentagonal bipyramids, corners with four equivalent Zn(1)O4 tetrahedra, and edges with five equivalent Sr(1)O7 pentagonal bipyramids. Both Zn(1)-O(1) bond lengths are 1.98 Å. There is one shorter (1.95 Å) and one longer (2.03 Å) Zn(1)-O(2) bond length. There are two inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Sr(1) and two equivalent Zn(1) atoms to form distorted OSr3Zn2 square pyramids that share corners with eight equivalent O(2)Sr4Zn2 octahedra, edges with four equivalent O(2)Sr4Zn2 octahedra, and edges with four equivalent O(1)Sr3Zn2 square pyramids. The corner-sharing octahedral tilt angles range from 27-62°. In the second O site, O(2) is bonded to four equivalent Sr(1) and two equivalent Zn(1) atoms to form OSr4Zn2 octahedra that share corners with four equivalent O(2)Sr4Zn2 octahedra, corners with eight equivalent O(1)Sr3Zn2 square pyramids, edges with two equivalent O(2)Sr4Zn2 octahedra, edges with four equivalent O(1)Sr3Zn2 square pyramids, and faces with two equivalent O(2)Sr4Zn2 octahedra. The corner-sharing octahedral tilt angles are 62°.