Ok, we'll use that. If anyone can suggest a better title (i.e. more accurate and neutral, preferably using representative language from the article itself) we can change it again.
The melting part is important. It's not just a complex crystal structure. If's a crystal structure with slots that are filled with the same material. The interesting part is that the filling and the main crystal structure have a different fusion temperature.
"At high pressures, potassium adopts a mix of crystalline and liquid structure"???
