SrBi6(PO5)4 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(6), and two equivalent O(8) atoms. There are three inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(7), one O(8), and one O(9) atom. In the second Bi site, Bi(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(6), one O(7), and two equivalent O(8) atoms. In the third Bi site, Bi(3) is bonded in a 6-coordinate geometry to one O(10), one O(4), one O(5), one O(9), and two equivalent O(2) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one O(10), one O(4), one O(6), and one O(7) atom. In the second P site, P(2) is bonded in a tetrahedral geometry to one O(1), one O(3), one O(5), and one O(9) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Sr(1), one Bi(2), and one P(2) atom. In the second O site, O(2) is bonded to one Bi(1), one Bi(2), and two equivalent Bi(3) atoms to form OBi4 tetrahedra that share  a cornercorner with one O(8)SrBi3 tetrahedra,  an edgeedge with one O(2)Bi4 tetrahedra, and  an edgeedge with one O(8)SrBi3 tetrahedra. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Sr(1), one Bi(1), and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Bi(2), one Bi(3), and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Bi(2), one Bi(3), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Sr(1), one Bi(2), and one P(1) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Bi(1), one Bi(2), and one P(1) atom. In the eighth O site, O(8) is bonded to one Sr(1), one Bi(1), and two equivalent Bi(2) atoms to form OSrBi3 tetrahedra that share  a cornercorner with one O(2)Bi4 tetrahedra,  a cornercorner with one O(8)SrBi3 tetrahedra,  an edgeedge with one O(2)Bi4 tetrahedra, and  an edgeedge with one O(8)SrBi3 tetrahedra. In the ninth O site, O(9) is bonded in a 1-coordinate geometry to one Bi(1), one Bi(3), and one P(2) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Bi(3) and one P(1) atom.
SrBi6(PO5)4 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(6), and two equivalent O(8) atoms. Both Sr(1)-O(1) bond lengths are 2.63 Å. Both Sr(1)-O(3) bond lengths are 2.59 Å. Both Sr(1)-O(6) bond lengths are 2.53 Å. Both Sr(1)-O(8) bond lengths are 2.71 Å. There are three inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(7), one O(8), and one O(9) atom. The Bi(1)-O(2) bond length is 2.30 Å. The Bi(1)-O(3) bond length is 2.43 Å. The Bi(1)-O(7) bond length is 2.34 Å. The Bi(1)-O(8) bond length is 2.13 Å. The Bi(1)-O(9) bond length is 2.29 Å. In the second Bi site, Bi(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(6), one O(7), and two equivalent O(8) atoms. The Bi(2)-O(1) bond length is 2.41 Å. The Bi(2)-O(2) bond length is 2.52 Å. The Bi(2)-O(4) bond length is 2.64 Å. The Bi(2)-O(5) bond length is 2.75 Å. The Bi(2)-O(6) bond length is 2.42 Å. The Bi(2)-O(7) bond length is 2.72 Å. There is one shorter (2.26 Å) and one longer (2.35 Å) Bi(2)-O(8) bond length. In the third Bi site, Bi(3) is bonded in a 6-coordinate geometry to one O(10), one O(4), one O(5), one O(9), and two equivalent O(2) atoms. The Bi(3)-O(10) bond length is 2.44 Å. The Bi(3)-O(4) bond length is 2.46 Å. The Bi(3)-O(5) bond length is 2.31 Å. The Bi(3)-O(9) bond length is 2.69 Å. There is one shorter (2.20 Å) and one longer (2.29 Å) Bi(3)-O(2) bond length. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one O(10), one O(4), one O(6), and one O(7) atom. The P(1)-O(10) bond length is 1.55 Å. The P(1)-O(4) bond length is 1.55 Å. The P(1)-O(6) bond length is 1.54 Å. The P(1)-O(7) bond length is 1.54 Å. In the second P site, P(2) is bonded in a tetrahedral geometry to one O(1), one O(3), one O(5), and one O(9) atom. The P(2)-O(1) bond length is 1.53 Å. The P(2)-O(3) bond length is 1.54 Å. The P(2)-O(5) bond length is 1.54 Å. The P(2)-O(9) bond length is 1.54 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Sr(1), one Bi(2), and one P(2) atom. In the second O site, O(2) is bonded to one Bi(1), one Bi(2), and two equivalent Bi(3) atoms to form OBi4 tetrahedra that share  a cornercorner with one O(8)SrBi3 tetrahedra,  an edgeedge with one O(2)Bi4 tetrahedra, and  an edgeedge with one O(8)SrBi3 tetrahedra. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Sr(1), one Bi(1), and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Bi(2), one Bi(3), and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Bi(2), one Bi(3), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Sr(1), one Bi(2), and one P(1) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Bi(1), one Bi(2), and one P(1) atom. In the eighth O site, O(8) is bonded to one Sr(1), one Bi(1), and two equivalent Bi(2) atoms to form OSrBi3 tetrahedra that share  a cornercorner with one O(2)Bi4 tetrahedra,  a cornercorner with one O(8)SrBi3 tetrahedra,  an edgeedge with one O(2)Bi4 tetrahedra, and  an edgeedge with one O(8)SrBi3 tetrahedra. In the ninth O site, O(9) is bonded in a 1-coordinate geometry to one Bi(1), one Bi(3), and one P(2) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Bi(3) and one P(1) atom.