Sr3GaO4F crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to six equivalent O(1) and two equivalent F(1) atoms. In the second Sr site, Sr(2) is bonded in a distorted q6 geometry to eight equivalent O(1) and two equivalent F(1) atoms. Ga(1) is bonded in a tetrahedral geometry to four equivalent O(1) atoms. O(1) is bonded to two equivalent Sr(2), three equivalent Sr(1), and one Ga(1) atom to form distorted OSr5Ga octahedra that share corners with four equivalent F(1)Sr6 octahedra, corners with ten equivalent O(1)Sr5Ga octahedra, edges with eight equivalent O(1)Sr5Ga octahedra, faces with two equivalent O(1)Sr5Ga octahedra, and faces with two equivalent F(1)Sr6 octahedra. The corner-sharing octahedral tilt angles range from 32-65°. F(1) is bonded to two equivalent Sr(2) and four equivalent Sr(1) atoms to form FSr6 octahedra that share corners with six equivalent F(1)Sr6 octahedra, corners with sixteen equivalent O(1)Sr5Ga octahedra, and faces with eight equivalent O(1)Sr5Ga octahedra. The corner-sharing octahedral tilt angles range from 0-65°.
Sr3GaO4F crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to six equivalent O(1) and two equivalent F(1) atoms. There are two shorter (2.42 Å) and four longer (2.69 Å) Sr(1)-O(1) bond lengths. Both Sr(1)-F(1) bond lengths are 2.52 Å. In the second Sr site, Sr(2) is bonded in a distorted q6 geometry to eight equivalent O(1) and two equivalent F(1) atoms. All Sr(2)-O(1) bond lengths are 2.85 Å. Both Sr(2)-F(1) bond lengths are 2.85 Å. Ga(1) is bonded in a tetrahedral geometry to four equivalent O(1) atoms. All Ga(1)-O(1) bond lengths are 1.86 Å. O(1) is bonded to two equivalent Sr(2), three equivalent Sr(1), and one Ga(1) atom to form distorted OSr5Ga octahedra that share corners with four equivalent F(1)Sr6 octahedra, corners with ten equivalent O(1)Sr5Ga octahedra, edges with eight equivalent O(1)Sr5Ga octahedra, faces with two equivalent O(1)Sr5Ga octahedra, and faces with two equivalent F(1)Sr6 octahedra. The corner-sharing octahedral tilt angles range from 32-65°. F(1) is bonded to two equivalent Sr(2) and four equivalent Sr(1) atoms to form FSr6 octahedra that share corners with six equivalent F(1)Sr6 octahedra, corners with sixteen equivalent O(1)Sr5Ga octahedra, and faces with eight equivalent O(1)Sr5Ga octahedra. The corner-sharing octahedral tilt angles range from 0-65°.