erbium

Erbium is a chemical element with the symbol Er and atomic number 68. It is a rare-earth metal that is found in the minerals monazite and bastnasite. Erbium is a silvery-white metal that is soft and ductile. It is also a good conductor of heat and electricity.

Erbium is used in a variety of applications, including:

• Lasers: Erbium is used in lasers that are used for surgery and for telecommunications.
• Fibre optics: Erbium is used in fibre optics to amplify light signals.
• Magnetism: Erbium is a strong magnet and is used in magnetic materials.
• Nuclear power: Erbium is used in nuclear power plants to control the reaction.

Erbium is used in a variety of applications, including lasers, fiber optics, and magnetic materials.