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 7-coordinate geometry to one O(1), one O(10), one O(11), one O(14), one O(15), one O(3), and one O(8) atom. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(16), one O(2), one O(4), and one O(9) atom. Mg(1) is bonded in a 6-coordinate geometry to one O(10), one O(14), one O(16), one O(2), one O(8), and one O(9) atom. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 4-coordinate geometry to one O(13), one O(4), one O(5), and one O(7) atom. In the second Zn site, Zn(2) is bonded in a 4-coordinate geometry to one Sn(1), one O(12), one O(15), and one O(6) atom. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted L-shaped geometry to one Zn(2), one O(12), and one O(3) atom. In the second Sn site, Sn(2) is bonded in a 3-coordinate geometry to one O(13), one O(14), and one O(7) atom. There are four inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one O(11), one O(12), one O(2), and one O(9) atom. 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 in a tetrahedral geometry to one O(10), one O(14), one O(15), and one O(7) atom. 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 distorted trigonal non-coplanar geometry to one Sr(1), one Sr(2), and one P(2) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Sr(2), one Mg(1), and one P(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Sr(1), one Sn(1), and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Sr(2), one Zn(1), and one P(4) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Zn(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Zn(2) and one P(4) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Zn(1), one Sn(2), and one P(3) atom. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to one Sr(1), one Mg(1), and one P(4) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Sr(2), one Mg(1), and one P(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Sr(1), one Mg(1), and one P(3) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one P(1) atom. In the twelfth O site, O(12) is bonded in a trigonal planar 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 Zn(1), one Sn(2), and one P(2) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Sr(1), one Mg(1), one Sn(2), and one P(3) atom. In the fifteenth O site, O(15) is bonded in a 3-coordinate geometry to one Sr(1), one Zn(2), and one P(3) atom. In the sixteenth O site, O(16) is bonded in a T-shaped geometry to one Sr(2), one Mg(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 7-coordinate geometry to one O(1), one O(10), one O(11), one O(14), one O(15), one O(3), and one O(8) atom. The Sr(1)-O(1) bond length is 2.55 Å. The Sr(1)-O(10) bond length is 2.62 Å. The Sr(1)-O(11) bond length is 2.41 Å. The Sr(1)-O(14) bond length is 2.93 Å. The Sr(1)-O(15) bond length is 2.60 Å. The Sr(1)-O(3) bond length is 3.09 Å. The Sr(1)-O(8) bond length is 2.45 Å. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(16), one O(2), one O(4), and one O(9) atom. The Sr(2)-O(1) bond length is 2.52 Å. The Sr(2)-O(11) bond length is 2.59 Å. The Sr(2)-O(16) bond length is 2.41 Å. The Sr(2)-O(2) bond length is 2.53 Å. The Sr(2)-O(4) bond length is 2.63 Å. The Sr(2)-O(9) bond length is 2.54 Å. Mg(1) is bonded in a 6-coordinate geometry to one O(10), one O(14), one O(16), one O(2), one O(8), and one O(9) atom. The Mg(1)-O(10) bond length is 2.07 Å. The Mg(1)-O(14) bond length is 2.21 Å. The Mg(1)-O(16) bond length is 2.13 Å. The Mg(1)-O(2) bond length is 2.40 Å. The Mg(1)-O(8) bond length is 2.11 Å. The Mg(1)-O(9) bond length is 2.04 Å. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 4-coordinate geometry to one O(13), one O(4), one O(5), and one O(7) atom. The Zn(1)-O(13) bond length is 2.09 Å. The Zn(1)-O(4) bond length is 1.99 Å. The Zn(1)-O(5) bond length is 1.98 Å. The Zn(1)-O(7) bond length is 2.06 Å. In the second Zn site, Zn(2) is bonded in a 4-coordinate geometry to one Sn(1), one O(12), one O(15), and one O(6) atom. The Zn(2)-Sn(1) bond length is 2.57 Å. The Zn(2)-O(12) bond length is 2.04 Å. The Zn(2)-O(15) bond length is 2.42 Å. The Zn(2)-O(6) bond length is 2.08 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted L-shaped geometry to one Zn(2), one O(12), and one O(3) atom. The Sn(1)-O(12) bond length is 2.19 Å. The Sn(1)-O(3) bond length is 2.12 Å. In the second Sn site, Sn(2) is bonded in a 3-coordinate geometry to one O(13), one O(14), and one O(7) atom. The Sn(2)-O(13) bond length is 2.39 Å. The Sn(2)-O(14) bond length is 2.41 Å. The Sn(2)-O(7) bond length is 2.34 Å. There are four inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one O(11), one O(12), one O(2), and one O(9) atom. The P(1)-O(11) bond length is 1.53 Å. The P(1)-O(12) bond length is 1.62 Å. The P(1)-O(2) bond length is 1.53 Å. The P(1)-O(9) bond length is 1.56 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 1.54 Å. The P(2)-O(13) bond length is 1.58 Å. The P(2)-O(3) bond length is 1.57 Å. The P(2)-O(5) bond length is 1.56 Å. In the third P site, P(3) is bonded in a tetrahedral geometry to one O(10), one O(14), one O(15), and one O(7) atom. The P(3)-O(10) bond length is 1.55 Å. The P(3)-O(14) bond length is 1.60 Å. The P(3)-O(15) bond length is 1.53 Å. The P(3)-O(7) bond length is 1.57 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 1.57 Å. The P(4)-O(6) bond length is 1.53 Å. The P(4)-O(8) bond length is 1.56 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Sr(2), and one P(2) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Sr(2), one Mg(1), and one P(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Sr(1), one Sn(1), and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Sr(2), one Zn(1), and one P(4) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Zn(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Zn(2) and one P(4) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Zn(1), one Sn(2), and one P(3) atom. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to one Sr(1), one Mg(1), and one P(4) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Sr(2), one Mg(1), and one P(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Sr(1), one Mg(1), and one P(3) atom. In the eleventh O site, O(11) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one P(1) atom. In the twelfth O site, O(12) is bonded in a trigonal planar 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 Zn(1), one Sn(2), and one P(2) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Sr(1), one Mg(1), one Sn(2), and one P(3) atom. In the fifteenth O site, O(15) is bonded in a 3-coordinate geometry to one Sr(1), one Zn(2), and one P(3) atom. In the sixteenth O site, O(16) is bonded in a T-shaped geometry to one Sr(2), one Mg(1), and one P(4) atom.