Na4MgTi2(SiO5)2 crystallizes in the tetragonal P4mm space group. Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms. Mg(1) is bonded in a 5-coordinate geometry to one O(2) and four equivalent O(4) atoms. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a 5-coordinate geometry to one O(1) and four equivalent O(3) atoms. In the second Ti site, Ti(2) is bonded in a distorted single-bond geometry to one O(2) and four equivalent O(4) atoms. Si(1) is bonded in a tetrahedral geometry to two equivalent O(3) and two equivalent O(4) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to four equivalent Na(1) and one Ti(1) atom. In the second O site, O(2) is bonded in a distorted linear geometry to four equivalent Na(1), one Mg(1), and one Ti(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Ti(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to two equivalent Na(1), one Mg(1), one Ti(2), and one Si(1) atom.
Na4MgTi2(SiO5)2 crystallizes in the tetragonal P4mm space group. Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms. The Na(1)-O(1) bond length is 2.49 Å. The Na(1)-O(2) bond length is 2.57 Å. Both Na(1)-O(3) bond lengths are 2.47 Å. Both Na(1)-O(4) bond lengths are 2.61 Å. Mg(1) is bonded in a 5-coordinate geometry to one O(2) and four equivalent O(4) atoms. The Mg(1)-O(2) bond length is 1.79 Å. All Mg(1)-O(4) bond lengths are 2.02 Å. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a 5-coordinate geometry to one O(1) and four equivalent O(3) atoms. The Ti(1)-O(1) bond length is 1.77 Å. All Ti(1)-O(3) bond lengths are 2.03 Å. In the second Ti site, Ti(2) is bonded in a distorted single-bond geometry to one O(2) and four equivalent O(4) atoms. The Ti(2)-O(2) bond length is 1.78 Å. All Ti(2)-O(4) bond lengths are 2.40 Å. Si(1) is bonded in a tetrahedral geometry to two equivalent O(3) and two equivalent O(4) atoms. Both Si(1)-O(3) bond lengths are 1.67 Å. Both Si(1)-O(4) bond lengths are 1.65 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to four equivalent Na(1) and one Ti(1) atom. In the second O site, O(2) is bonded in a distorted linear geometry to four equivalent Na(1), one Mg(1), and one Ti(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Ti(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to two equivalent Na(1), one Mg(1), one Ti(2), and one Si(1) atom.