Definition

Noun: - A soft, white, earthy clay mineral consisting of aluminum silicate (Al₂Si₂O₅(OH)₄). It is the primary constituent of kaolin clay.

Usage

• As a specific mineral: Used to name the specific mineral species.
  • The soil's white color is due to the presence of kaolinite.
  • Under the microscope, we identified the crystals as kaolinite.
• As a material source: Used to indicate it is the main component of kaolin.
  • High-quality porcelain is made from clay rich in kaolinite.
  • Kaolinite is the main source of kaolin used in the paper industry.

Advanced Usage

• In geology/mineralogy: The term is used in technical descriptions of rock and soil composition.
  • The hydrothermal alteration converted the feldspar into kaolinite.
• In industrial contexts: Refers to the mineral as a raw material.
  • The purity of the kaolinite affects the brightness of the coated paper.

Variants and Related Words

• Kaolin (noun): The clay rock or deposit composed largely of kaolinite.
  • The region is famous for its deposits of kaolin.
• Kaolinitic (adjective): Describing a material containing or resembling kaolinite.
  • The kaolinitic shale is easily eroded.

Synonyms

• China clay mineral (contextual)
• Aluminum silicate hydroxide (chemical term)

Related Phrases/Compounds

• Kaolinite group: The subgroup of clay minerals to which kaolinite belongs.
  • Dickite and nacrite are polymorphs in the kaolinite group.

Noun

1. a mineral consisting of aluminum silicate; main source of kaolin