What makes critical raw materials critical?  What are the conceptual frameworks behind criticality, what can they explain, and where are their limits? Dominique Guyonnet from the French Geological Survey will explain this to you in the following three videos.

Familiarise yourself with the concept of criticality before calculating an important parameter influencing the criticality index for different materials in the assignment.

In this video, we are reminded how important mineral raw materials are in our everyday lives, and gather an understanding of the development and motivation of criticality concepts.