What is Ukraine demanding in its negotiations with the United States regarding rare earth minerals?

Ukraine is seeking both national security guarantees and a more favorable financial arrangement in any deal with the United States regarding its rare earth mineral resources, estimated to be worth $16 trillion. President Zelensky has already rejected an American proposal that requested 50% control of the sector, indicating Ukraine's firm stance on maintaining sovereignty over these valuable resources. The situation is further complicated by the fact that many of these crucial mineral deposits are located in Russian-occupied territories. This geopolitical reality adds urgency to Ukraine's demands, as these minerals are essential for technology and military applications, making them strategically significant in the current global landscape where China dominates supply.