Sr5(CrO4)3Cl crystallizes in the hexagonal P6_3 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(2), two equivalent O(3), and two equivalent Cl(1) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to three equivalent O(1), three equivalent O(3), and three equivalent O(4) atoms. In the third Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(2), two equivalent O(3), and two equivalent Cl(1) atoms. In the fourth Sr site, Sr(3) is bonded in a 9-coordinate geometry to three equivalent O(1), three equivalent O(2), and three equivalent O(4) atoms. Cr(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(1) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), and one Cr(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Sr(3); two Sr(1,1); and one Cr(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to one Sr(2), two equivalent Sr(1), and one Cr(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), and one Cr(1) atom. Cl(1) is bonded to six Sr(1,1) atoms to form face-sharing ClSr6 octahedra.
Sr5(CrO4)3Cl crystallizes in the hexagonal P6_3 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(2), two equivalent O(3), and two equivalent Cl(1) atoms. The Sr(1)-O(1) bond length is 2.90 Å. The Sr(1)-O(4) bond length is 2.48 Å. There is one shorter (2.53 Å) and one longer (2.76 Å) Sr(1)-O(2) bond length. There is one shorter (2.51 Å) and one longer (2.68 Å) Sr(1)-O(3) bond length. There is one shorter (3.17 Å) and one longer (3.21 Å) Sr(1)-Cl(1) bond length. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to three equivalent O(1), three equivalent O(3), and three equivalent O(4) atoms. All Sr(2)-O(1) bond lengths are 2.59 Å. All Sr(2)-O(3) bond lengths are 3.01 Å. All Sr(2)-O(4) bond lengths are 2.60 Å. In the third Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(2), two equivalent O(3), and two equivalent Cl(1) atoms. The Sr(1)-O(1) bond length is 2.90 Å. The Sr(1)-O(4) bond length is 2.48 Å. There is one shorter (2.53 Å) and one longer (2.76 Å) Sr(1)-O(2) bond length. There is one shorter (2.51 Å) and one longer (2.68 Å) Sr(1)-O(3) bond length. There is one shorter (3.17 Å) and one longer (3.21 Å) Sr(1)-Cl(1) bond length. In the fourth Sr site, Sr(3) is bonded in a 9-coordinate geometry to three equivalent O(1), three equivalent O(2), and three equivalent O(4) atoms. All Sr(3)-O(1) bond lengths are 2.61 Å. All Sr(3)-O(2) bond lengths are 2.87 Å. All Sr(3)-O(4) bond lengths are 2.63 Å. Cr(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. The Cr(1)-O(1) bond length is 1.73 Å. The Cr(1)-O(2) bond length is 1.72 Å. The Cr(1)-O(3) bond length is 1.72 Å. The Cr(1)-O(4) bond length is 1.73 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), and one Cr(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Sr(3); two Sr(1,1); and one Cr(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to one Sr(2), two equivalent Sr(1), and one Cr(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), and one Cr(1) atom. Cl(1) is bonded to six Sr(1,1) atoms to form face-sharing ClSr6 octahedra.