Introduction — The Rare Earth Elements: An

Lanthanum is widely used in petroleum refining, while cerium is a staple in automotive catalytic converters. 3. Global Supply Chain and Geopolitics

These same magnets are vital for the generators in wind turbines and the motors of electric vehicles (EVs). The Rare Earth Elements: An Introduction

Neodymium and praseodymium are used to create the world’s strongest permanent magnets, found in everything from smartphone speakers to hard drives. Lanthanum is widely used in petroleum refining, while

Terbium through lutetium, plus yttrium. These are rarer and often more valuable due to their specific high-tech applications. Neodymium and praseodymium are used to create the

Lanthanum through gadolinium. These are generally more abundant.

The Rare Earth Elements: An Introduction are a set of seventeen metallic elements, including the fifteen lanthanides on the periodic table plus scandium and yttrium. Despite their name, they are relatively abundant in the Earth’s crust; however, they are rarely found in concentrated, economically exploitable deposits, making their extraction and refinement uniquely challenging. 1. Classification and Chemical Nature The REEs are divided into two main categories:

REEs are critical in precision-guided munitions, sonar, and laser range-finding.