SrK2P4O12 crystallizes in the tetragonal I-4 space group. K(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. Sr(1) is bonded in a 8-coordinate geometry to four equivalent O(2) and four equivalent O(3) atoms. P(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form corner-sharing PO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one K(1) and two equivalent P(1) atoms. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1), one Sr(1), and one P(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent K(1), one Sr(1), and one P(1) atom.
SrK2P4O12 crystallizes in the tetragonal I-4 space group. K(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. Both K(1)-O(1) bond lengths are 3.08 Å. Both K(1)-O(2) bond lengths are 2.85 Å. There are two shorter (2.91 Å) and two longer (3.03 Å) K(1)-O(3) bond lengths. Sr(1) is bonded in a 8-coordinate geometry to four equivalent O(2) and four equivalent O(3) atoms. All Sr(1)-O(2) bond lengths are 2.71 Å. All Sr(1)-O(3) bond lengths are 2.56 Å. P(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form corner-sharing PO4 tetrahedra. The P(1)-O(2) bond length is 1.50 Å. The P(1)-O(3) bond length is 1.50 Å. Both P(1)-O(1) bond lengths are 1.63 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one K(1) and two equivalent P(1) atoms. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1), one Sr(1), and one P(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent K(1), one Sr(1), and one P(1) atom.