Sr3P6(N4O3)2 crystallizes in the trigonal P-3 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 10-coordinate geometry to one N(2), three equivalent N(1), and six equivalent O(1) atoms. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. P(1) is bonded to one N(2), two equivalent N(1), and one O(1) atom to form corner-sharing PN3O tetrahedra. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted bent 120 degrees geometry to one Sr(1) and two equivalent P(1) atoms. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Sr(1) and three equivalent P(1) atoms. O(1) is bonded in a distorted single-bond geometry to one Sr(2), two equivalent Sr(1), and one P(1) atom.
Sr3P6(N4O3)2 crystallizes in the trigonal P-3 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 10-coordinate geometry to one N(2), three equivalent N(1), and six equivalent O(1) atoms. The Sr(1)-N(2) bond length is 2.83 Å. All Sr(1)-N(1) bond lengths are 2.92 Å. There are three shorter (2.70 Å) and three longer (2.91 Å) Sr(1)-O(1) bond lengths. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. All Sr(2)-O(1) bond lengths are 2.64 Å. P(1) is bonded to one N(2), two equivalent N(1), and one O(1) atom to form corner-sharing PN3O tetrahedra. The P(1)-N(2) bond length is 1.73 Å. There is one shorter (1.61 Å) and one longer (1.62 Å) P(1)-N(1) bond length. The P(1)-O(1) bond length is 1.54 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted bent 120 degrees geometry to one Sr(1) and two equivalent P(1) atoms. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Sr(1) and three equivalent P(1) atoms. O(1) is bonded in a distorted single-bond geometry to one Sr(2), two equivalent Sr(1), and one P(1) atom.