CaTi2F10 crystallizes in the monoclinic C2 space group. Ca(1) is bonded to one F(3), two equivalent F(1), two equivalent F(5), and two equivalent F(6) atoms to form distorted CaF7 pentagonal bipyramids that share corners with four equivalent Ti(1)F6 octahedra and edges with two equivalent Ti(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 1-23°. Ti(1) is bonded to one F(1), one F(2), one F(3), one F(4), one F(5), and one F(6) atom to form TiF6 octahedra that share corners with two equivalent Ti(1)F6 octahedra, corners with two equivalent Ca(1)F7 pentagonal bipyramids, and  an edgeedge with one Ca(1)F7 pentagonal bipyramid. The corner-sharing octahedral tilt angles range from 20-27°. There are six inequivalent F sites. In the first F site, F(1) is bonded in a linear geometry to one Ca(1) and one Ti(1) atom. In the second F site, F(2) is bonded in a single-bond geometry to one Ti(1) atom. In the third F site, F(3) is bonded in a 3-coordinate geometry to one Ca(1) and two equivalent Ti(1) atoms. In the fourth F site, F(4) is bonded in a bent 150 degrees geometry to two equivalent Ti(1) atoms. In the fifth F site, F(5) is bonded in a bent 120 degrees geometry to one Ca(1) and one Ti(1) atom. In the sixth F site, F(6) is bonded in a bent 150 degrees geometry to one Ca(1) and one Ti(1) atom.
CaTi2F10 crystallizes in the monoclinic C2 space group. Ca(1) is bonded to one F(3), two equivalent F(1), two equivalent F(5), and two equivalent F(6) atoms to form distorted CaF7 pentagonal bipyramids that share corners with four equivalent Ti(1)F6 octahedra and edges with two equivalent Ti(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 1-23°. The Ca(1)-F(3) bond length is 2.58 Å. Both Ca(1)-F(1) bond lengths are 2.26 Å. Both Ca(1)-F(5) bond lengths are 2.39 Å. Both Ca(1)-F(6) bond lengths are 2.31 Å. Ti(1) is bonded to one F(1), one F(2), one F(3), one F(4), one F(5), and one F(6) atom to form TiF6 octahedra that share corners with two equivalent Ti(1)F6 octahedra, corners with two equivalent Ca(1)F7 pentagonal bipyramids, and  an edgeedge with one Ca(1)F7 pentagonal bipyramid. The corner-sharing octahedral tilt angles range from 20-27°. The Ti(1)-F(1) bond length is 1.92 Å. The Ti(1)-F(2) bond length is 1.79 Å. The Ti(1)-F(3) bond length is 2.03 Å. The Ti(1)-F(4) bond length is 1.96 Å. The Ti(1)-F(5) bond length is 1.87 Å. The Ti(1)-F(6) bond length is 1.87 Å. There are six inequivalent F sites. In the first F site, F(1) is bonded in a linear geometry to one Ca(1) and one Ti(1) atom. In the second F site, F(2) is bonded in a single-bond geometry to one Ti(1) atom. In the third F site, F(3) is bonded in a 3-coordinate geometry to one Ca(1) and two equivalent Ti(1) atoms. In the fourth F site, F(4) is bonded in a bent 150 degrees geometry to two equivalent Ti(1) atoms. In the fifth F site, F(5) is bonded in a bent 120 degrees geometry to one Ca(1) and one Ti(1) atom. In the sixth F site, F(6) is bonded in a bent 150 degrees geometry to one Ca(1) and one Ti(1) atom.