Sr10P6O24BrCl crystallizes in the trigonal P-3 space group. There are three 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(3), and three equivalent O(4) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to three equivalent O(2), three equivalent O(3), and three equivalent O(4) atoms. In the third Sr site, Sr(3) is bonded in a 8-coordinate geometry to one O(3), one O(4), two equivalent O(1), two equivalent O(2), one Br(1), and one Cl(1) atom. P(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(4) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), and one P(1) atom. In the second O site, O(1) is bonded in a 1-coordinate geometry to one Sr(1), two equivalent Sr(3), and one P(1) atom. In the third O site, O(2) is bonded in a 1-coordinate geometry to one Sr(2), two equivalent Sr(3), and one P(1) atom. In the fourth O site, O(3) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), one Sr(3), and one P(1) atom. Br(1) is bonded to six equivalent Sr(3) atoms to form BrSr6 octahedra that share faces with two equivalent Cl(1)Sr6 octahedra. Cl(1) is bonded to six equivalent Sr(3) atoms to form ClSr6 octahedra that share faces with two equivalent Br(1)Sr6 octahedra.
Sr10P6O24BrCl crystallizes in the trigonal P-3 space group. There are three 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(3), and three equivalent O(4) atoms. All Sr(1)-O(1) bond lengths are 2.93 Å. All Sr(1)-O(3) bond lengths are 2.59 Å. All Sr(1)-O(4) bond lengths are 2.60 Å. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to three equivalent O(2), three equivalent O(3), and three equivalent O(4) atoms. All Sr(2)-O(2) bond lengths are 2.93 Å. All Sr(2)-O(3) bond lengths are 2.59 Å. All Sr(2)-O(4) bond lengths are 2.60 Å. In the third Sr site, Sr(3) is bonded in a 8-coordinate geometry to one O(3), one O(4), two equivalent O(1), two equivalent O(2), one Br(1), and one Cl(1) atom. The Sr(3)-O(3) bond length is 2.99 Å. The Sr(3)-O(4) bond length is 2.44 Å. There is one shorter (2.55 Å) and one longer (2.77 Å) Sr(3)-O(1) bond length. There is one shorter (2.52 Å) and one longer (2.75 Å) Sr(3)-O(2) bond length. The Sr(3)-Br(1) bond length is 3.17 Å. The Sr(3)-Cl(1) bond length is 3.16 Å. P(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) 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 1.56 Å. The P(1)-O(4) bond length is 1.57 Å. There are four inequivalent O sites. In the first O site, O(4) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), and one P(1) atom. In the second O site, O(1) is bonded in a 1-coordinate geometry to one Sr(1), two equivalent Sr(3), and one P(1) atom. In the third O site, O(2) is bonded in a 1-coordinate geometry to one Sr(2), two equivalent Sr(3), and one P(1) atom. In the fourth O site, O(3) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), one Sr(3), and one P(1) atom. Br(1) is bonded to six equivalent Sr(3) atoms to form BrSr6 octahedra that share faces with two equivalent Cl(1)Sr6 octahedra. Cl(1) is bonded to six equivalent Sr(3) atoms to form ClSr6 octahedra that share faces with two equivalent Br(1)Sr6 octahedra.