SrMgTi(PO4)2 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 8-coordinate geometry to one O(2), one O(3), one O(4), one O(8), two equivalent O(1), and two equivalent O(6) atoms. Mg(1) is bonded in a 4-coordinate geometry to one O(2), one O(4), one O(7), and two equivalent O(5) atoms. Ti(1) is bonded in a 6-coordinate geometry to one O(3), one O(4), one O(5), one O(7), and two equivalent O(8) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(7) atom. In the second P site, P(2) is bonded in a tetrahedral geometry to one O(4), one O(5), one O(6), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to two equivalent Sr(1) and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sr(1), one Mg(1), and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sr(1), one Ti(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Sr(1), one Mg(1), one Ti(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Mg(1), one Ti(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to two equivalent Sr(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Ti(1), and one P(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Ti(1), and one P(2) atom.
SrMgTi(PO4)2 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 8-coordinate geometry to one O(2), one O(3), one O(4), one O(8), two equivalent O(1), and two equivalent O(6) atoms. The Sr(1)-O(2) bond length is 2.72 Å. The Sr(1)-O(3) bond length is 2.59 Å. The Sr(1)-O(4) bond length is 2.90 Å. The Sr(1)-O(8) bond length is 2.82 Å. There is one shorter (2.54 Å) and one longer (2.66 Å) Sr(1)-O(1) bond length. There is one shorter (2.51 Å) and one longer (2.76 Å) Sr(1)-O(6) bond length. Mg(1) is bonded in a 4-coordinate geometry to one O(2), one O(4), one O(7), and two equivalent O(5) atoms. The Mg(1)-O(2) bond length is 2.01 Å. The Mg(1)-O(4) bond length is 2.05 Å. The Mg(1)-O(7) bond length is 2.04 Å. There is one shorter (2.04 Å) and one longer (2.65 Å) Mg(1)-O(5) bond length. Ti(1) is bonded in a 6-coordinate geometry to one O(3), one O(4), one O(5), one O(7), and two equivalent O(8) atoms. The Ti(1)-O(3) bond length is 2.18 Å. The Ti(1)-O(4) bond length is 2.14 Å. The Ti(1)-O(5) bond length is 2.53 Å. The Ti(1)-O(7) bond length is 2.10 Å. There is one shorter (2.11 Å) and one longer (2.12 Å) Ti(1)-O(8) bond length. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(7) atom. The P(1)-O(1) bond length is 1.55 Å. The P(1)-O(2) bond length is 1.56 Å. The P(1)-O(3) bond length is 1.54 Å. The P(1)-O(7) bond length is 1.57 Å. In the second P site, P(2) is bonded in a tetrahedral geometry to one O(4), one O(5), one O(6), and one O(8) atom. The P(2)-O(4) bond length is 1.58 Å. The P(2)-O(5) bond length is 1.57 Å. The P(2)-O(6) bond length is 1.52 Å. The P(2)-O(8) bond length is 1.58 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to two equivalent Sr(1) and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sr(1), one Mg(1), and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sr(1), one Ti(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Sr(1), one Mg(1), one Ti(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Mg(1), one Ti(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to two equivalent Sr(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Ti(1), and one P(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Ti(1), and one P(2) atom.