Sr2MgZn2Sn2(PO4)4 crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(11), one O(13), one O(14), one O(2), one O(5), and one O(8) atom. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(11), one O(16), one O(3), one O(4), one O(8), and one O(9) atom. Mg(1) is bonded to one O(1), one O(10), one O(14), one O(15), and one O(9) atom to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one Zn(2)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and  an edgeedge with one P(3)O4 tetrahedra. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 3-coordinate geometry to one Sn(2), one O(13), one O(6), and one O(7) atom. In the second Zn site, Zn(2) is bonded to one O(12), one O(15), one O(2), and one O(6) atom to form distorted ZnO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and  a cornercorner with one Mg(1)O5 trigonal bipyramid. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 4-coordinate geometry to one O(12), one O(16), one O(3), and one O(4) atom. In the second Sn site, Sn(2) is bonded in a 3-coordinate geometry to one Zn(1), one O(16), and one O(5) atom. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(11), one O(12), one O(2), and one O(9) atom to form PO4 tetrahedra that share corners with two equivalent Zn(2)O4 tetrahedra and  a cornercorner with one Mg(1)O5 trigonal bipyramid. In the second P site, P(2) is bonded to one O(1), one O(13), one O(3), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Mg(1)O5 trigonal bipyramid. In the third P site, P(3) is bonded to one O(10), one O(14), one O(15), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Zn(2)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. In the fourth P site, P(4) is bonded to one O(16), one O(4), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Zn(2)O4 tetrahedra. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Sr(1), one Sr(2), one Mg(1), and one P(2) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Sr(1), one Zn(2), and one P(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Sr(2), one Sn(1), and one P(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Sr(2), one Sn(1), and one P(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Sn(2), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(2), and one P(4) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Zn(1) and one P(3) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one P(4) atom. In the ninth O site, O(9) is bonded in a distorted linear geometry to one Sr(2), one Mg(1), and one P(1) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Mg(1), and one P(3) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one P(1) atom. In the twelfth O site, O(12) is bonded in a 2-coordinate geometry to one Zn(2), one Sn(1), and one P(1) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Sr(1), one Zn(1), and one P(2) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one Sr(1), one Mg(1), and one P(3) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Mg(1), one Zn(2), and one P(3) atom. In the sixteenth O site, O(16) is bonded in a 4-coordinate geometry to one Sr(2), one Sn(1), one Sn(2), and one P(4) atom.
Sr2MgZn2Sn2(PO4)4 crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(11), one O(13), one O(14), one O(2), one O(5), and one O(8) atom. The Sr(1)-O(1) bond length is 2.61 Å. The Sr(1)-O(10) bond length is 2.78 Å. The Sr(1)-O(11) bond length is 2.55 Å. The Sr(1)-O(13) bond length is 2.52 Å. The Sr(1)-O(14) bond length is 2.66 Å. The Sr(1)-O(2) bond length is 3.15 Å. The Sr(1)-O(5) bond length is 2.60 Å. The Sr(1)-O(8) bond length is 2.62 Å. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(11), one O(16), one O(3), one O(4), one O(8), and one O(9) atom. The Sr(2)-O(1) bond length is 2.94 Å. The Sr(2)-O(10) bond length is 2.60 Å. The Sr(2)-O(11) bond length is 2.55 Å. The Sr(2)-O(16) bond length is 2.74 Å. The Sr(2)-O(3) bond length is 2.60 Å. The Sr(2)-O(4) bond length is 2.73 Å. The Sr(2)-O(8) bond length is 2.81 Å. The Sr(2)-O(9) bond length is 2.74 Å. Mg(1) is bonded to one O(1), one O(10), one O(14), one O(15), and one O(9) atom to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one Zn(2)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and  an edgeedge with one P(3)O4 tetrahedra. The Mg(1)-O(1) bond length is 2.00 Å. The Mg(1)-O(10) bond length is 2.17 Å. The Mg(1)-O(14) bond length is 2.03 Å. The Mg(1)-O(15) bond length is 2.19 Å. The Mg(1)-O(9) bond length is 1.96 Å. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 3-coordinate geometry to one Sn(2), one O(13), one O(6), and one O(7) atom. The Zn(1)-Sn(2) bond length is 2.61 Å. The Zn(1)-O(13) bond length is 2.03 Å. The Zn(1)-O(6) bond length is 2.11 Å. The Zn(1)-O(7) bond length is 2.00 Å. In the second Zn site, Zn(2) is bonded to one O(12), one O(15), one O(2), and one O(6) atom to form distorted ZnO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and  a cornercorner with one Mg(1)O5 trigonal bipyramid. The Zn(2)-O(12) bond length is 1.97 Å. The Zn(2)-O(15) bond length is 2.10 Å. The Zn(2)-O(2) bond length is 1.96 Å. The Zn(2)-O(6) bond length is 2.14 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 4-coordinate geometry to one O(12), one O(16), one O(3), and one O(4) atom. The Sn(1)-O(12) bond length is 2.68 Å. The Sn(1)-O(16) bond length is 2.42 Å. The Sn(1)-O(3) bond length is 2.55 Å. The Sn(1)-O(4) bond length is 2.29 Å. In the second Sn site, Sn(2) is bonded in a 3-coordinate geometry to one Zn(1), one O(16), and one O(5) atom. The Sn(2)-O(16) bond length is 2.26 Å. The Sn(2)-O(5) bond length is 2.27 Å. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(11), one O(12), one O(2), and one O(9) atom to form PO4 tetrahedra that share corners with two equivalent Zn(2)O4 tetrahedra and  a cornercorner with one Mg(1)O5 trigonal bipyramid. The P(1)-O(11) bond length is 1.55 Å. The P(1)-O(12) bond length is 1.58 Å. The P(1)-O(2) bond length is 1.57 Å. The P(1)-O(9) bond length is 1.54 Å. In the second P site, P(2) is bonded to one O(1), one O(13), one O(3), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Mg(1)O5 trigonal bipyramid. The P(2)-O(1) bond length is 1.55 Å. The P(2)-O(13) bond length is 1.55 Å. The P(2)-O(3) bond length is 1.54 Å. The P(2)-O(5) bond length is 1.58 Å. In the third P site, P(3) is bonded to one O(10), one O(14), one O(15), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Zn(2)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The P(3)-O(10) bond length is 1.55 Å. The P(3)-O(14) bond length is 1.55 Å. The P(3)-O(15) bond length is 1.62 Å. The P(3)-O(7) bond length is 1.53 Å. In the fourth P site, P(4) is bonded to one O(16), one O(4), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Zn(2)O4 tetrahedra. The P(4)-O(16) bond length is 1.59 Å. The P(4)-O(4) bond length is 1.55 Å. The P(4)-O(6) bond length is 1.59 Å. The P(4)-O(8) bond length is 1.52 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Sr(1), one Sr(2), one Mg(1), and one P(2) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Sr(1), one Zn(2), and one P(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Sr(2), one Sn(1), and one P(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Sr(2), one Sn(1), and one P(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Sn(2), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(2), and one P(4) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Zn(1) and one P(3) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one P(4) atom. In the ninth O site, O(9) is bonded in a distorted linear geometry to one Sr(2), one Mg(1), and one P(1) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Mg(1), and one P(3) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one P(1) atom. In the twelfth O site, O(12) is bonded in a 2-coordinate geometry to one Zn(2), one Sn(1), and one P(1) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Sr(1), one Zn(1), and one P(2) atom. In the fourteenth O site, O(14) is bonded in a 3-coordinate geometry to one Sr(1), one Mg(1), and one P(3) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Mg(1), one Zn(2), and one P(3) atom. In the sixteenth O site, O(16) is bonded in a 4-coordinate geometry to one Sr(2), one Sn(1), one Sn(2), and one P(4) atom.