Entity: RARE-EARTH
Rare-earth refers to a group of oxides of metals occurring in scarce minerals, with elements having atomic numbers 57 to 71. The term may also imply something strange or extraordinary.
RARE-EARTH
Etymology
The term 'rare-earth' originates from the rarely found minerals containing these elements. The word 'earth' comes from an old name for oxides, the chemical form of these elements.
Definition
Rare-earth refers to a group of oxides of metals or a mixture of such oxides occurring in widely distributed but relatively scarce minerals, with elements having atomic numbers 57 to 71.
Historical Context
Rare earths were primarily discovered as components of minerals. The adjective 'rare' may also imply something strange or extraordinary.
Cultural Significance
Rare-earth elements have significant importance in various industries, including technology, energy, and defense, due to their unique properties.
Related Concepts
Rare-earth elements are part of the lanthanide series and may include yttrium and scandium. They are essential in the production of many modern devices.
See Also
A group of oxides of metals or a mixture of such oxides found in scarce minerals, with elements having atomic numbers 57 to 71.