lepidomelane

Thân thiện

A geologist examines a sample of lepidomelane under bright light.

Definition

1. Noun:
   • A type of mica mineral: Lepidomelane is a specific variety of the mica mineral group, characterized as an iron-rich biotite.

Usage Examples

• Noun:
  • The geologist identified the black, shiny flakes in the rock as lepidomelane.
  • Lepidomelane is often found in granitic and metamorphic rocks.

Advanced Usage

• Scientific Classification: In mineralogy, "lepidomelane" is used to specify a dark, iron-bearing mica within the broader biotite series, helping to describe the precise chemical composition of a rock sample.

Variants and Related Words

• Biotite (n): A common rock-forming mineral of the mica group, of which lepidomelane is an iron-rich variety.
• Mica (n): A group of silicate minerals known for their perfect basal cleavage, allowing them to split into thin, often transparent sheets.

Synonyms

• Iron-rich biotite: A descriptive synonym that highlights its chemical composition.
• Black mica: A general, non-technical term that could refer to lepidomelane or other dark micas like phlogopite.

Related Terms

• Phyllosilicate (n): The broader class of silicate minerals to which mica, and therefore lepidomelane, belongs, characterized by sheet-like structures.

Học thuật

Noun

1. a mica that is a biotite containing iron