Sr3GeO5 crystallizes in the tetragonal P4/ncc space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 10-coordinate geometry to two equivalent O(1) and eight equivalent O(2) atoms. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to two equivalent O(1) and six equivalent O(2) atoms. Ge(1) is bonded in a tetrahedral geometry to four equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1) and four equivalent Sr(2) atoms to form corner-sharing OSr6 octahedra. The corner-sharing octahedral tilt angles range from 0-31°. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Sr(1), three equivalent Sr(2), and one Ge(1) atom.
Sr3GeO5 crystallizes in the tetragonal P4/ncc space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 10-coordinate geometry to two equivalent O(1) and eight equivalent O(2) atoms. There is one shorter (2.69 Å) and one longer (2.98 Å) Sr(1)-O(1) bond length. There are four shorter (2.87 Å) and four longer (2.94 Å) Sr(1)-O(2) bond lengths. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to two equivalent O(1) and six equivalent O(2) atoms. Both Sr(2)-O(1) bond lengths are 2.55 Å. There are a spread of Sr(2)-O(2) bond distances ranging from 2.46-2.85 Å. Ge(1) is bonded in a tetrahedral geometry to four equivalent O(2) atoms. All Ge(1)-O(2) bond lengths are 1.77 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1) and four equivalent Sr(2) atoms to form corner-sharing OSr6 octahedra. The corner-sharing octahedral tilt angles range from 0-31°. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Sr(1), three equivalent Sr(2), and one Ge(1) atom.