Wrong fusion heat for Potassium?

[FeralFox]

Hello,

When sorting the elements by their fusion heat, I was wondering why potassium was standing out (102.5kJ/mol) that much. When looking at other references, I found that potassium has a heat of fusion of 2.33 kJ/mol (e.g. in Wikipedia)Is this a mistake or do I miss something?

I want to thank you for this great project. I think this really can change the way you think about chemical elements and to get an idea how things work together.