Ca2Sn2F3 crystallizes in the monoclinic Cm space group. There are three inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 4-coordinate geometry to one Sn(1), one Sn(3), one F(1), one F(2), one F(3), and one F(4) atom. In the second Ca site, Ca(2) is bonded in a 5-coordinate geometry to one Sn(1), one F(4), two equivalent F(2), and two equivalent F(3) atoms. In the third Ca site, Ca(3) is bonded in a distorted pentagonal planar geometry to one Sn(3), one F(1), two equivalent F(2), and two equivalent F(3) atoms. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 5-coordinate geometry to one Ca(2), two equivalent Ca(1), and two equivalent Sn(2) atoms. In the second Sn site, Sn(2) is bonded in a 3-coordinate geometry to one Sn(1) and one Sn(3) atom. In the third Sn site, Sn(3) is bonded in a 5-coordinate geometry to one Ca(3), two equivalent Ca(1), and two equivalent Sn(2) atoms. There are four inequivalent F sites. In the first F site, F(1) is bonded in a trigonal non-coplanar geometry to one Ca(3) and two equivalent Ca(1) atoms. In the second F site, F(2) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1), one Ca(2), and one Ca(3) atom. In the third F site, F(3) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1), one Ca(2), and one Ca(3) atom. In the fourth F site, F(4) is bonded in a trigonal non-coplanar geometry to one Ca(2) and two equivalent Ca(1) atoms.
Ca2Sn2F3 crystallizes in the monoclinic Cm space group. There are three inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 4-coordinate geometry to one Sn(1), one Sn(3), one F(1), one F(2), one F(3), and one F(4) atom. The Ca(1)-Sn(1) bond length is 3.45 Å. The Ca(1)-Sn(3) bond length is 3.60 Å. The Ca(1)-F(1) bond length is 2.17 Å. The Ca(1)-F(2) bond length is 2.23 Å. The Ca(1)-F(3) bond length is 2.25 Å. The Ca(1)-F(4) bond length is 2.16 Å. In the second Ca site, Ca(2) is bonded in a 5-coordinate geometry to one Sn(1), one F(4), two equivalent F(2), and two equivalent F(3) atoms. The Ca(2)-Sn(1) bond length is 3.24 Å. The Ca(2)-F(4) bond length is 2.28 Å. Both Ca(2)-F(2) bond lengths are 2.46 Å. Both Ca(2)-F(3) bond lengths are 2.25 Å. In the third Ca site, Ca(3) is bonded in a distorted pentagonal planar geometry to one Sn(3), one F(1), two equivalent F(2), and two equivalent F(3) atoms. The Ca(3)-Sn(3) bond length is 3.58 Å. The Ca(3)-F(1) bond length is 2.24 Å. Both Ca(3)-F(2) bond lengths are 2.23 Å. Both Ca(3)-F(3) bond lengths are 2.49 Å. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 5-coordinate geometry to one Ca(2), two equivalent Ca(1), and two equivalent Sn(2) atoms. Both Sn(1)-Sn(2) bond lengths are 3.06 Å. In the second Sn site, Sn(2) is bonded in a 3-coordinate geometry to one Sn(1) and one Sn(3) atom. The Sn(2)-Sn(3) bond length is 2.99 Å. In the third Sn site, Sn(3) is bonded in a 5-coordinate geometry to one Ca(3), two equivalent Ca(1), and two equivalent Sn(2) atoms. There are four inequivalent F sites. In the first F site, F(1) is bonded in a trigonal non-coplanar geometry to one Ca(3) and two equivalent Ca(1) atoms. In the second F site, F(2) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1), one Ca(2), and one Ca(3) atom. In the third F site, F(3) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1), one Ca(2), and one Ca(3) atom. In the fourth F site, F(4) is bonded in a trigonal non-coplanar geometry to one Ca(2) and two equivalent Ca(1) atoms.