Cs2SnCu3F12 crystallizes in the trigonal R-3m space group. Cs(1) is bonded in a 6-coordinate geometry to three equivalent F(1) and three equivalent F(2) atoms. Cu(1) is bonded to two equivalent F(2) and four equivalent F(1) atoms to form CuF6 octahedra that share corners with two equivalent Sn(1)F6 octahedra and corners with four equivalent Cu(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 41-46°. Sn(1) is bonded to six equivalent F(2) atoms to form SnF6 octahedra that share corners with six equivalent Cu(1)F6 octahedra. The corner-sharing octahedral tilt angles are 46°. There are two inequivalent F sites. In the first F site, F(1) is bonded in a distorted bent 150 degrees geometry to one Cs(1) and two equivalent Cu(1) atoms. In the second F site, F(2) is bonded in a 2-coordinate geometry to one Cs(1), one Cu(1), and one Sn(1) atom.
Cs2SnCu3F12 crystallizes in the trigonal R-3m space group. Cs(1) is bonded in a 6-coordinate geometry to three equivalent F(1) and three equivalent F(2) atoms. All Cs(1)-F(1) bond lengths are 3.17 Å. All Cs(1)-F(2) bond lengths are 3.45 Å. Cu(1) is bonded to two equivalent F(2) and four equivalent F(1) atoms to form CuF6 octahedra that share corners with two equivalent Sn(1)F6 octahedra and corners with four equivalent Cu(1)F6 octahedra. The corner-sharing octahedral tilt angles range from 41-46°. Both Cu(1)-F(2) bond lengths are 2.41 Å. All Cu(1)-F(1) bond lengths are 1.93 Å. Sn(1) is bonded to six equivalent F(2) atoms to form SnF6 octahedra that share corners with six equivalent Cu(1)F6 octahedra. The corner-sharing octahedral tilt angles are 46°. All Sn(1)-F(2) bond lengths are 2.01 Å. There are two inequivalent F sites. In the first F site, F(1) is bonded in a distorted bent 150 degrees geometry to one Cs(1) and two equivalent Cu(1) atoms. In the second F site, F(2) is bonded in a 2-coordinate geometry to one Cs(1), one Cu(1), and one Sn(1) atom.