Definition

Noun: A metallic chemical element with the symbol Tb and atomic number 65. It is a soft, silvery-white, malleable, and ductile rare earth metal that is part of the lanthanide series on the periodic table. Terbium metal is stable in air but can oxidize slowly. It is used in various solid-state devices and as a dopant in materials that fluoresce.

Usage

Terbium metal is typically discussed in scientific, industrial, and technological contexts. It is often mentioned alongside other rare earth elements due to its specialized applications. - It is handled and stored under inert atmospheres like argon in laboratory settings to prevent oxidation. - In industry, it is processed into alloys or compounds for specific technological uses.

Examples

• Scientific Context:
  • Terbium metal is essential for producing the green phosphors in color television tubes and fluorescent lamps.
  • The researchers alloyed terbium metal with dysprosium to study its magnetostrictive properties.
• Industrial Context:
  • The company specializes in refining terbium metal from rare earth mineral concentrates.
  • High-purity terbium metal commands a premium price in the electronics market.

Advanced Usage

• "Terbium metal foil": A thin sheet of the elemental metal, used in research and specialized manufacturing.
  • The experiment required a sputtering target made from terbium metal foil.
• "Doped with terbium metal": Refers to a host material (like a crystal or glass) that has had terbium atoms added to alter its properties, often its luminescence.
  • The laser crystal, doped with terbium metal, emitted a characteristic green light.

Variants and Related Words

• Terbium (n): The name of the element itself, which can refer to the metal or its ionic form in compounds. Often used interchangeably with "terbium metal" in non-technical contexts.
  • Terbium is a key component in many green-emitting phosphors.
• Terbium(III) ion / Tb³⁺ (n): The trivalent ionic form of terbium, commonly found in its compounds and solutions, responsible for its fluorescent properties.
  • The bright green emission comes from the terbium(III) ion.

Synonyms

• Tb (n): The chemical symbol for terbium.
• Element 65 (n): A reference to its atomic number.

Related Phrases

• Terbium-doped material: A common technical phrase describing a host material containing terbium ions.
  • Terbium-doped zinc sulfide is a well-known phosphor.
• Terbium alloy: A mixture of terbium metal with one or more other metals.
  • A terbium-iron alloy exhibits giant magnetostriction.

Noun

1. a separate group of related lanthanides, including terbium, europium, gadolinium, and sometimes dysprosium