Heavy Rare Earth Elements (HREE) are an essential part of many high-tech devices
The HREE are a set of seventeen metallic elements. These include the fifteen lanthanides on the periodic table plus scandium and yttrium.
HREE are necessary components of hundreds of consumer products across a wide range of applications, especially high-tech consumer products, such as cellular telephones, computer hard drives, electric and hybrid vehicles, and flat-screen monitors and televisions.
Significant defense applications include electronic displays, guidance systems, lasers, and radar and sonar systems. Although the amount of HREE used in a product may not be a significant part of that product by weight, value, or volume, the HREE can be necessary for the device to function. For example, magnets made of HREE often represent only a small fraction of the total weight, but without them, the spindle motors and voice coils of desktops and laptops would not be possible.