Ca2TiSnSi2O10 crystallizes in the triclinic P-1 space group. Ca(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), two equivalent O(4), and two equivalent O(5) atoms. Ti(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form TiO6 octahedra that share corners with two equivalent Sn(1)O6 octahedra and corners with four equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 42°. Sn(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form SnO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra and corners with four equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 42°. Si(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form SiO4 tetrahedra that share corners with two equivalent Ti(1)O6 octahedra and corners with two equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-55°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ca(1), one Sn(1), and one Si(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Ca(1), one Ti(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ca(1), one Ti(1), and one Sn(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one Ti(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one Sn(1), and one Si(1) atom.
Ca2TiSnSi2O10 crystallizes in the triclinic P-1 space group. Ca(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), two equivalent O(4), and two equivalent O(5) atoms. The Ca(1)-O(1) bond length is 2.43 Å. The Ca(1)-O(2) bond length is 2.43 Å. The Ca(1)-O(3) bond length is 2.26 Å. There is one shorter (2.46 Å) and one longer (2.69 Å) Ca(1)-O(4) bond length. There is one shorter (2.48 Å) and one longer (2.72 Å) Ca(1)-O(5) bond length. Ti(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form TiO6 octahedra that share corners with two equivalent Sn(1)O6 octahedra and corners with four equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 42°. Both Ti(1)-O(2) bond lengths are 2.02 Å. Both Ti(1)-O(3) bond lengths are 1.87 Å. Both Ti(1)-O(4) bond lengths are 2.06 Å. Sn(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form SnO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra and corners with four equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 42°. Both Sn(1)-O(1) bond lengths are 2.10 Å. Both Sn(1)-O(3) bond lengths are 1.99 Å. Both Sn(1)-O(5) bond lengths are 2.12 Å. Si(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form SiO4 tetrahedra that share corners with two equivalent Ti(1)O6 octahedra and corners with two equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-55°. The Si(1)-O(1) bond length is 1.65 Å. The Si(1)-O(2) bond length is 1.65 Å. The Si(1)-O(4) bond length is 1.66 Å. The Si(1)-O(5) bond length is 1.66 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ca(1), one Sn(1), and one Si(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Ca(1), one Ti(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Ca(1), one Ti(1), and one Sn(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one Ti(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Ca(1), one Sn(1), and one Si(1) atom.