MgSn2O5 crystallizes in the triclinic P1 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 6-coordinate geometry to two equivalent O(10), two equivalent O(2), and two equivalent O(7) atoms. In the second Mg site, Mg(2) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(8), and two equivalent O(9) atoms. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(10), one O(2), one O(4), and two equivalent O(3) atoms to form a mixture of distorted edge and corner-sharing SnO5 trigonal bipyramids. In the second Sn site, Sn(2) is bonded to one O(1), one O(3), one O(9), and two equivalent O(4) atoms to form a mixture of distorted edge and corner-sharing SnO5 trigonal bipyramids. In the third Sn site, Sn(3) is bonded to one O(1), one O(5), one O(8), and two equivalent O(6) atoms to form a mixture of distorted edge and corner-sharing SnO5 trigonal bipyramids. In the fourth Sn site, Sn(4) is bonded to one O(2), one O(6), one O(7), and two equivalent O(5) atoms to form a mixture of distorted edge and corner-sharing SnO5 trigonal bipyramids. There are ten inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(2), one Sn(2), and one Sn(3) atom to form corner-sharing OMg2Sn2 tetrahedra. In the second O site, O(2) is bonded to two equivalent Mg(1), one Sn(1), and one Sn(4) atom to form corner-sharing OMg2Sn2 tetrahedra. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Sn(2) and two equivalent Sn(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Sn(1) and two equivalent Sn(2) atoms. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Sn(3) and two equivalent Sn(4) atoms. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Sn(4) and two equivalent Sn(3) atoms. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to two equivalent Mg(1) and one Sn(4) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Mg(2) and one Sn(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Mg(2) and one Sn(2) atom. In the tenth O site, O(10) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Mg(1) and one Sn(1) atom.
MgSn2O5 crystallizes in the triclinic P1 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 6-coordinate geometry to two equivalent O(10), two equivalent O(2), and two equivalent O(7) atoms. There is one shorter (2.22 Å) and one longer (2.37 Å) Mg(1)-O(10) bond length. Both Mg(1)-O(2) bond lengths are 2.34 Å. There is one shorter (2.24 Å) and one longer (2.33 Å) Mg(1)-O(7) bond length. In the second Mg site, Mg(2) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(8), and two equivalent O(9) atoms. There is one shorter (2.33 Å) and one longer (2.35 Å) Mg(2)-O(1) bond length. There is one shorter (2.23 Å) and one longer (2.35 Å) Mg(2)-O(8) bond length. There is one shorter (2.19 Å) and one longer (2.40 Å) Mg(2)-O(9) bond length. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(10), one O(2), one O(4), and two equivalent O(3) atoms to form a mixture of distorted edge and corner-sharing SnO5 trigonal bipyramids. The Sn(1)-O(10) bond length is 1.93 Å. The Sn(1)-O(2) bond length is 2.07 Å. The Sn(1)-O(4) bond length is 2.23 Å. There is one shorter (2.03 Å) and one longer (2.04 Å) Sn(1)-O(3) bond length. In the second Sn site, Sn(2) is bonded to one O(1), one O(3), one O(9), and two equivalent O(4) atoms to form a mixture of distorted edge and corner-sharing SnO5 trigonal bipyramids. The Sn(2)-O(1) bond length is 2.07 Å. The Sn(2)-O(3) bond length is 2.24 Å. The Sn(2)-O(9) bond length is 1.93 Å. There is one shorter (2.03 Å) and one longer (2.04 Å) Sn(2)-O(4) bond length. In the third Sn site, Sn(3) is bonded to one O(1), one O(5), one O(8), and two equivalent O(6) atoms to form a mixture of distorted edge and corner-sharing SnO5 trigonal bipyramids. The Sn(3)-O(1) bond length is 2.07 Å. The Sn(3)-O(5) bond length is 2.24 Å. The Sn(3)-O(8) bond length is 1.93 Å. There is one shorter (2.03 Å) and one longer (2.04 Å) Sn(3)-O(6) bond length. In the fourth Sn site, Sn(4) is bonded to one O(2), one O(6), one O(7), and two equivalent O(5) atoms to form a mixture of distorted edge and corner-sharing SnO5 trigonal bipyramids. The Sn(4)-O(2) bond length is 2.07 Å. The Sn(4)-O(6) bond length is 2.23 Å. The Sn(4)-O(7) bond length is 1.93 Å. There is one shorter (2.03 Å) and one longer (2.04 Å) Sn(4)-O(5) bond length. There are ten inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(2), one Sn(2), and one Sn(3) atom to form corner-sharing OMg2Sn2 tetrahedra. In the second O site, O(2) is bonded to two equivalent Mg(1), one Sn(1), and one Sn(4) atom to form corner-sharing OMg2Sn2 tetrahedra. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Sn(2) and two equivalent Sn(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Sn(1) and two equivalent Sn(2) atoms. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Sn(3) and two equivalent Sn(4) atoms. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Sn(4) and two equivalent Sn(3) atoms. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to two equivalent Mg(1) and one Sn(4) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Mg(2) and one Sn(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Mg(2) and one Sn(2) atom. In the tenth O site, O(10) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Mg(1) and one Sn(1) atom.