There are 17 rare-earth elements, which are commonly found together. Although often only required in trace amounts, they serve critical and irreplaceable functions in technologies used in ...
Rare-earth minerals “form an integral part of the modern ... but may also “have adverse health effects”. The group of 17 metals is “critical for both human and national security ...
Rare earths are a group of 17 elements used in production in a huge number of sectors, including renewable energy technology, oil refinery, electronics, and the glass industry. Although called ...