They in the Netherlands do not know that fluorspar and graphite are not elements, but minerals?

"Critical materials and The Netherlands – a view fromthe industrial- technological sector"  

This research was conducted by a combined team of M2i (Derk Bol, Hans Christ) and TNO (Ton Bastein, Niels van Loon, Gerrit Oosterhuis). M2i was supported by the Faculty of Industrial Design Engineering at Delft University of Technology (Ivana Moerland under guidance of David Peck and Conny Bakker). This research formed the basis of the graduation project of Ivana Moerland. This report was originally published in February, 2012 and was titled ‘Kritische materialen en de Nederlandse technologische industrie’.   More

Fluorspar is not a composed material or element, but a mineral.

Promethium is practically not found in nature. No one makes promethium and no one uses it.

Graphite is a mineral, but not an element (С). 

C (carbon)? What about a carbon-free future?

Half metals can be removed from list.

Ph.D. Natalia Petrovskaya