magnetite

American  

[mag-ni-tahyt] / ˈmæg nɪˌtaɪt /

noun

1. a very common black iron oxide mineral, Fe 3 O 4 , that is strongly attracted by magnets: an important iron ore.

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magnetite British  

/ ˈmæɡnɪˌtaɪt /

noun

1. a black magnetic mineral, found in igneous and metamorphic rocks and as a separate deposit. It is a source of iron. Composition: iron oxide. Formula: Fe 3 O 4 . Crystal structure: cubic

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magnetite Scientific  

/ măg′nĭ-tīt′ /

1. A brown to black mineral that is strongly magnetic. It crystallizes in the cubic system and commonly occurs as small octahedrons. Magnetite occurs in many different types of rock and is an important source of iron. Chemical formula: Fe ₃ O ₄ .

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Other Word Forms

• magnetitic
  adjective

Etymology

Origin of magnetite

1850–55; magnet + -ite ¹; compare German Magnetit

Example Sentences

See Examples For:

magnetite

Scientists from ECU's School of Engineering found that magnetite can release hydrogen gas when it reacts with hot water under conditions similar to those deep below the Earth's surface.

From Science Daily ● Aug. 29, 2026

But for Witkoff, like his boss, they are like magnetite.

From Slate ● Jul. 22, 2026

In addition to ferrihydrite the researchers used various quantities of iron oxide phases like magnetite, hematite, feroxyhyte and schwertmannite.

From Salon ● Mar. 1, 2025

The researchers found that magnetite induced an immune response in the mice and in the human neuronal cells in the lab.

From Science Daily ● Feb. 29, 2024

Some of the last were concave mirrors made from beautifully polished magnetite.

From "1491" by Charles C. Mann