1. a soft aluminum silicate mineral that is white, gray, or pale green and has a greasy feel
Usage: mineralogy

Examples

• The geologist identified the specimen as pyrophyllite based on its greasy texture.
• Pyrophyllite is commonly used in the manufacture of ceramics and refractories.
• The pale green pyrophyllite sample was found in the metamorphic rock formation.
• Industrial applications of pyrophyllite include use as a filler in paint and rubber.
• The mineral pyrophyllite has a hardness of 1-2 on the Mohs scale.
• Pyrophyllite deposits are often associated with other metamorphic minerals.