goethite

Thân thiện

A geologist holds a piece of goethite in a rocky field.

Definition

Noun: A red, yellow, or brown mineral; an oxide of iron that is a common constituent of rust. It is an iron oxyhydroxide with the chemical formula α-FeO(OH).

Usage

"Goethite" is a technical term used primarily in the fields of geology, mineralogy, and chemistry. It refers to a specific, naturally occurring mineral.

Examples

• Geologists identified the brown streaks in the rock as goethite.
• The presence of goethite is a key indicator of certain weathering processes.
• This sample of rust contains a mixture of hematite and goethite.

Advanced Usage

• In mineral classification: Goethite is an important ore mineral for iron, though less so than hematite or magnetite. It often forms through the weathering of other iron-bearing minerals.
• In pigment history: Historically, powdered goethite was used as a pigment, known as yellow ochre.

Variants and Related Words

• Limonite: A term often used for a mixture of various iron oxides and hydroxides, including goethite, that has a yellowish-brown color.
• Iron Oxyhydroxide: The broader chemical classification for goethite.

Synonyms

• Iron(III) oxide-hydroxide (chemical synonym)

Related Phrases

• Botryoidal goethite: Describing goethite that has formed in a rounded, grape-like cluster shape.
• Goethite pseudomorph: A specimen where goethite has replaced another mineral but retains the original mineral's crystal shape.

Học thuật

Noun

1. a red or yellow or brown mineral; an oxide of iron that is a common constituent of rust

Từ đồng nghĩa

• gothite