Definition

Noun: 1. A white or greenish aluminum silicate mineral: A specific type of mineral, a hydrous aluminum silicate, known for its softness and soapy or pearly feel, which closely resembles talc in its physical appearance and properties.

Usage Examples

• Noun:
  • The carver used a block of soft pyrophyllite for the intricate sculpture.
  • Geologists identified the specimen as pyrophyllite due to its characteristic flaky structure and pearly luster.
  • In some regions, pyrophyllite is mined for use as a raw material in ceramics.

Advanced Usage

• Industrial Context: Pyrophyllite is valued in various industries not just for carving. Its thermal stability and resistance to chemical attack make it useful as a filler in paints, plastics, and as a material for high-temperature ceramics and refractories.

Variants and Related Words

• Mineralogical Group: Pyrophyllite is the namesake mineral of the pyrophyllite group, which includes other phyllosilicate minerals with similar layered structures.

Synonyms

• Mineral analog: Talc (Note: Talc is a magnesium silicate, while pyrophyllite is an aluminum silicate. They are visually and physically very similar but chemically distinct.)

Different Meanings

This word has a single, specific meaning in mineralogy and geology. It does not have common idiomatic or figurative uses.

Noun

1. a white or greenish aluminum silicate mineral (resembles talc)