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 9-coordinate geometry to one O(1), one O(11), one O(14), one O(15), one O(5), one O(8), one O(9), and two equivalent O(10) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(11), one O(16), one O(2), one O(3), one O(4), and two equivalent O(8) atoms. Mg(1) is bonded in a 4-coordinate geometry to one Sn(2), one O(14), one O(15), one O(7), and one O(9) atom. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 5-coordinate geometry to one Sn(2), one O(1), one O(13), one O(4), and one O(5) atom. In the second Zn site, Zn(2) is bonded to one O(11), one O(12), one O(15), and one O(2) atom to form distorted ZnO4 trigonal pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 4-coordinate geometry to one O(16), one O(3), one O(4), and one O(6) atom. In the second Sn site, Sn(2) is bonded in a 5-coordinate geometry to one Mg(1), one Zn(1), one O(12), one O(13), and one O(7) 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  a cornercorner with one Zn(2)O4 trigonal pyramid and  an edgeedge with one Zn(2)O4 trigonal pyramid. In the second P site, P(2) is bonded in a tetrahedral geometry to one O(1), one O(13), one O(3), and one O(5) atom. 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 trigonal pyramid. In the fourth P site, P(4) is bonded in a tetrahedral geometry to one O(16), one O(4), one O(6), and one O(8) atom. There are sixteen 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 Zn(1), and one P(2) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Sr(2), one Zn(2), and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sr(2), one Sn(1), and one P(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sr(2), one Zn(1), one Sn(1), and one P(4) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Sr(1), one Zn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Sn(1) and one P(4) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Mg(1), one Sn(2), and one P(3) atom. In the eighth O site, O(8) is bonded in a 1-coordinate geometry to one Sr(1), two equivalent Sr(2), and one P(4) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one Mg(1), and one P(1) atom. In the tenth O site, O(10) is bonded in a 1-coordinate geometry to one Sr(2), two equivalent Sr(1), and one P(3) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Zn(2), and one P(1) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Zn(2), one Sn(2), and one P(1) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Zn(1), one Sn(2), 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 3-coordinate geometry to one Sr(1), one Mg(1), one Zn(2), and one P(3) atom. In the sixteenth O site, O(16) is bonded in a distorted single-bond geometry to one Sr(2), one Sn(1), 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 9-coordinate geometry to one O(1), one O(11), one O(14), one O(15), one O(5), one O(8), one O(9), and two equivalent O(10) atoms. The Sr(1)-O(1) bond length is 2.58 Å. The Sr(1)-O(11) bond length is 2.94 Å. The Sr(1)-O(14) bond length is 2.54 Å. The Sr(1)-O(15) bond length is 2.91 Å. The Sr(1)-O(5) bond length is 2.58 Å. The Sr(1)-O(8) bond length is 2.48 Å. The Sr(1)-O(9) bond length is 2.95 Å. There is one shorter (2.76 Å) and one longer (3.22 Å) Sr(1)-O(10) bond length. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(11), one O(16), one O(2), one O(3), one O(4), and two equivalent O(8) atoms. The Sr(2)-O(1) bond length is 2.92 Å. The Sr(2)-O(10) bond length is 2.48 Å. The Sr(2)-O(11) bond length is 2.61 Å. The Sr(2)-O(16) bond length is 2.69 Å. The Sr(2)-O(2) bond length is 3.16 Å. The Sr(2)-O(3) bond length is 2.77 Å. The Sr(2)-O(4) bond length is 2.65 Å. There is one shorter (2.74 Å) and one longer (3.07 Å) Sr(2)-O(8) bond length. Mg(1) is bonded in a 4-coordinate geometry to one Sn(2), one O(14), one O(15), one O(7), and one O(9) atom. The Mg(1)-Sn(2) bond length is 2.81 Å. The Mg(1)-O(14) bond length is 2.00 Å. The Mg(1)-O(15) bond length is 2.21 Å. The Mg(1)-O(7) bond length is 2.21 Å. The Mg(1)-O(9) bond length is 1.99 Å. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 5-coordinate geometry to one Sn(2), one O(1), one O(13), one O(4), and one O(5) atom. The Zn(1)-Sn(2) bond length is 2.62 Å. The Zn(1)-O(1) bond length is 2.15 Å. The Zn(1)-O(13) bond length is 2.45 Å. The Zn(1)-O(4) bond length is 2.24 Å. The Zn(1)-O(5) bond length is 2.18 Å. In the second Zn site, Zn(2) is bonded to one O(11), one O(12), one O(15), and one O(2) atom to form distorted ZnO4 trigonal pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. The Zn(2)-O(11) bond length is 2.14 Å. The Zn(2)-O(12) bond length is 2.04 Å. The Zn(2)-O(15) bond length is 1.97 Å. The Zn(2)-O(2) bond length is 1.91 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 4-coordinate geometry to one O(16), one O(3), one O(4), and one O(6) atom. The Sn(1)-O(16) bond length is 2.42 Å. The Sn(1)-O(3) bond length is 2.18 Å. The Sn(1)-O(4) bond length is 2.31 Å. The Sn(1)-O(6) bond length is 2.34 Å. In the second Sn site, Sn(2) is bonded in a 5-coordinate geometry to one Mg(1), one Zn(1), one O(12), one O(13), and one O(7) atom. The Sn(2)-O(12) bond length is 2.39 Å. The Sn(2)-O(13) bond length is 2.28 Å. The Sn(2)-O(7) bond length is 2.67 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  a cornercorner with one Zn(2)O4 trigonal pyramid and  an edgeedge with one Zn(2)O4 trigonal pyramid. The P(1)-O(11) bond length is 1.57 Å. The P(1)-O(12) bond length is 1.61 Å. The P(1)-O(2) bond length is 1.54 Å. The P(1)-O(9) bond length is 1.53 Å. In the second P site, P(2) is bonded in a tetrahedral geometry to one O(1), one O(13), one O(3), and one O(5) atom. The P(2)-O(1) bond length is 1.56 Å. The P(2)-O(13) bond length is 1.57 Å. The P(2)-O(3) bond length is 1.57 Å. The P(2)-O(5) bond length is 1.54 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 trigonal pyramid. The P(3)-O(10) bond length is 1.54 Å. The P(3)-O(14) bond length is 1.56 Å. The P(3)-O(15) bond length is 1.60 Å. The P(3)-O(7) bond length is 1.55 Å. In the fourth P site, P(4) is bonded in a tetrahedral geometry to one O(16), one O(4), one O(6), and one O(8) atom. The P(4)-O(16) bond length is 1.55 Å. The P(4)-O(4) bond length is 1.60 Å. The P(4)-O(6) bond length is 1.55 Å. The P(4)-O(8) bond length is 1.54 Å. There are sixteen 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 Zn(1), and one P(2) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Sr(2), one Zn(2), and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sr(2), one Sn(1), and one P(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sr(2), one Zn(1), one Sn(1), and one P(4) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Sr(1), one Zn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Sn(1) and one P(4) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Mg(1), one Sn(2), and one P(3) atom. In the eighth O site, O(8) is bonded in a 1-coordinate geometry to one Sr(1), two equivalent Sr(2), and one P(4) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one Mg(1), and one P(1) atom. In the tenth O site, O(10) is bonded in a 1-coordinate geometry to one Sr(2), two equivalent Sr(1), and one P(3) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Zn(2), and one P(1) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Zn(2), one Sn(2), and one P(1) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Zn(1), one Sn(2), 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 3-coordinate geometry to one Sr(1), one Mg(1), one Zn(2), and one P(3) atom. In the sixteenth O site, O(16) is bonded in a distorted single-bond geometry to one Sr(2), one Sn(1), and one P(4) atom.