CaMn2F10 crystallizes in the monoclinic C2 space group. Ca(1) is bonded to one F(2), two equivalent F(4), two equivalent F(5), and two equivalent F(6) atoms to form CaF7 pentagonal bipyramids that share corners with four equivalent Mn(1)F6 octahedra and edges with two equivalent Mn(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 3-29°. Mn(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 MnF6 octahedra that share corners with two equivalent Mn(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 28-29°. There are six inequivalent F sites. In the first F site, F(1) is bonded in a bent 150 degrees geometry to two equivalent Mn(1) atoms. In the second F site, F(2) is bonded in a 3-coordinate geometry to one Ca(1) and two equivalent Mn(1) atoms. In the third F site, F(3) is bonded in a single-bond geometry to one Mn(1) atom. In the fourth F site, F(4) is bonded in a distorted bent 120 degrees geometry to one Ca(1) and one Mn(1) atom. In the fifth F site, F(5) is bonded in a bent 150 degrees geometry to one Ca(1) and one Mn(1) atom. In the sixth F site, F(6) is bonded in a linear geometry to one Ca(1) and one Mn(1) atom.
CaMn2F10 crystallizes in the monoclinic C2 space group. Ca(1) is bonded to one F(2), two equivalent F(4), two equivalent F(5), and two equivalent F(6) atoms to form CaF7 pentagonal bipyramids that share corners with four equivalent Mn(1)F6 octahedra and edges with two equivalent Mn(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 3-29°. The Ca(1)-F(2) bond length is 2.54 Å. Both Ca(1)-F(4) bond lengths are 2.43 Å. Both Ca(1)-F(5) bond lengths are 2.27 Å. Both Ca(1)-F(6) bond lengths are 2.25 Å. Mn(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 MnF6 octahedra that share corners with two equivalent Mn(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 28-29°. The Mn(1)-F(1) bond length is 1.88 Å. The Mn(1)-F(2) bond length is 1.93 Å. The Mn(1)-F(3) bond length is 1.76 Å. The Mn(1)-F(4) bond length is 1.82 Å. The Mn(1)-F(5) bond length is 1.83 Å. The Mn(1)-F(6) bond length is 1.86 Å. There are six inequivalent F sites. In the first F site, F(1) is bonded in a bent 150 degrees geometry to two equivalent Mn(1) atoms. In the second F site, F(2) is bonded in a 3-coordinate geometry to one Ca(1) and two equivalent Mn(1) atoms. In the third F site, F(3) is bonded in a single-bond geometry to one Mn(1) atom. In the fourth F site, F(4) is bonded in a distorted bent 120 degrees geometry to one Ca(1) and one Mn(1) atom. In the fifth F site, F(5) is bonded in a bent 150 degrees geometry to one Ca(1) and one Mn(1) atom. In the sixth F site, F(6) is bonded in a linear geometry to one Ca(1) and one Mn(1) atom.