Fig. 3

Geometric crystal structure of K2MgSiCl6/K2MgSiBr6 (a/e) before and (b/f) after heating the system at 300 K. Thermal stability of (c) K2MgSiCl6 and (d) K2MgSiBr6.

Geometric crystal structure of K2MgSiCl6/K2MgSiBr6 (a/e) before and (b/f) after heating the system at 300 K. Thermal stability of (c) K2MgSiCl6 and (d) K2MgSiBr6.