fig2
Figure 2. (A) [Sn4F12] supertetrahedra, [I4] tetrahedra and [K18] cage. (B) [Sn4F12I4] fundamental structural block in [K18] cage. Upper panel, view along the [210] direction, and lower panel, view along the a-axis. (C) Structure of K6Sn4F12I2•0.5H2O.