Sr5P3O14 crystallizes in the hexagonal P6_3/m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to three equivalent O(1), three equivalent O(2), and three equivalent O(4) atoms. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(2), one O(4), two equivalent O(3), and four equivalent O(1) atoms. P(1) is bonded in a tetrahedral geometry to one O(2), one O(4), and two equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(3) is bonded to three equivalent Sr(2) and one O(3) atom to form face-sharing OSr3O tetrahedra. In the second O site, O(4) is bonded in a distorted single-bond geometry to one Sr(2), two equivalent Sr(1), and one P(1) atom. In the third O site, O(1) is bonded in a 1-coordinate geometry to one Sr(1), two equivalent Sr(2), and one P(1) atom. In the fourth O site, O(2) is bonded in a 4-coordinate geometry to one Sr(2), two equivalent Sr(1), and one P(1) atom.
Sr5P3O14 crystallizes in the hexagonal P6_3/m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to three equivalent O(1), three equivalent O(2), and three equivalent O(4) atoms. All Sr(1)-O(1) bond lengths are 2.94 Å. All Sr(1)-O(2) bond lengths are 2.61 Å. All Sr(1)-O(4) bond lengths are 2.59 Å. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(2), one O(4), two equivalent O(3), and four equivalent O(1) atoms. The Sr(2)-O(2) bond length is 2.50 Å. The Sr(2)-O(4) bond length is 2.83 Å. Both Sr(2)-O(3) bond lengths are 2.72 Å. There are two shorter (2.54 Å) and two longer (2.67 Å) Sr(2)-O(1) bond lengths. P(1) is bonded in a tetrahedral geometry to one O(2), one O(4), and two equivalent O(1) atoms. The P(1)-O(2) bond length is 1.56 Å. The P(1)-O(4) bond length is 1.56 Å. Both P(1)-O(1) bond lengths are 1.56 Å. There are four inequivalent O sites. In the first O site, O(3) is bonded to three equivalent Sr(2) and one O(3) atom to form face-sharing OSr3O tetrahedra. The O(3)-O(3) bond length is 1.35 Å. In the second O site, O(4) is bonded in a distorted single-bond geometry to one Sr(2), two equivalent Sr(1), and one P(1) atom. In the third O site, O(1) is bonded in a 1-coordinate geometry to one Sr(1), two equivalent Sr(2), and one P(1) atom. In the fourth O site, O(2) is bonded in a 4-coordinate geometry to one Sr(2), two equivalent Sr(1), and one P(1) atom.