goethite

American  

[goh-thahyt, gœ-tahyt] / ˈgoʊ θaɪt, ˈgœ taɪt /

noun

1. a very common mineral, iron hydroxide, HFeO 2 , occurring in crystals, but more commonly in yellow or brown earthy masses: an ore of iron.

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goethite British  

/ ˈɡəʊθaɪt, ˈɡøːtiːt /

noun

1. a black, brown, or yellow mineral consisting of hydrated iron oxide in the form of orthorhombic crystals or fibrous masses. Formula: FeO(OH)

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Etymology

Origin of goethite

1815–25; named after Goethe; -ite ¹

Example Sentences

He's developing a technique to tease out rainfall and temperature histories from oxygen isotopes in goethite, an iron oxide that caps inselbergs in Brazil and Australia.

From Science Magazine

The paintings contain haematite and goethite from Keos, in the Aegean Sea, and red lead from Rio Tinto, in southern Spain.

From Economist

“We discovered that the fibres of goethite are just the right size to make up a resilient composite structure,” Barber said.

From Forbes

Those fibres, consisting of an iron-based mineral called goethite, are laced through a protein base in much the same way as carbon fibres can be used to strengthen plastic.

From BBC

They found the teeth contain a hard mineral known as goethite, which forms in the limpet as it grows.

From Reuters