kergemetallide
Kergemetallide, also known as rare earth elements (REEs), are a group of seventeen metallic elements comprising the lanthanide series, plus scandium and yttrium. Despite their name, most rare earth elements are not particularly rare in the Earth's crust, but they are often found dispersed and not in easily mineable concentrations. Their extraction and processing are complex and costly.
These elements possess unique chemical and physical properties that make them essential in a wide range of
China has historically been the dominant producer of kergemetallide, leading to concerns about supply chain security