magnetite

/'mægnitait/

Thân thiện

A student holds a magnet near a piece of magnetite on a science table.

Definition

1. Noun:
   • A naturally occurring magnetic mineral: Magnetite is a black or brownish-black mineral that is strongly attracted to magnets. It is an important iron ore.
   • A specific iron oxide: Chemically, magnetite is an oxide of iron with the formula Fe₃O₄. It is one of the primary ores of iron and possesses permanent magnetic properties.

Examples of Usage

• Noun:
  • The rock sample contained a high concentration of magnetite, causing it to stick to the magnet.
  • Magnetite is often found in igneous and metamorphic rocks.

Advanced Usage

• Scientific Context: In geology and materials science, "magnetite" is a key term. It is studied for its magnetic properties, its role in paleomagnetism (recording Earth's magnetic field in rocks), and its industrial use in producing iron and steel.
  • Researchers analyzed the magnetite crystals to understand the ancient magnetic field.

Variants and Related Words

• Magnetic (adj): Having the properties of a magnet; capable of being attracted by or attracting a magnet.
  • The magnetic force was strong due to the presence of magnetite.
• Magnet (n): An object or material that produces a magnetic field.
  • The magnet easily picked up the pieces of magnetite.

Synonyms

• Lodestone: A naturally magnetized piece of magnetite. (Note: While all lodestone is magnetite, not all magnetite is lodestone, as lodestone is specifically the magnetized form.)
• Iron oxide (Fe₃O₄): The chemical name for magnetite.

Related Phrases/Compounds

• Magnetite sand: Sand that contains a significant amount of magnetite grains, often found on certain beaches.
  • The black color of the beach was due to magnetite sand.

Học thuật

Noun

1. an oxide of iron that is strongly attracted by magnets

Từ đồng nghĩa

• magnetic iron-ore