mineral
Pyrophyllite
Al2Si4O10(OH)2
AI-generated identification · may be incorrectHardness of 1 to 2 on the Mohs scale, pearly to greasy luster, white to yellowish or greenish color, monoclinic crystal system with perfect basal cleavage.
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Physical properties
Hardness of 1 to 2 on the Mohs scale, pearly to greasy luster, white to yellowish or greenish color, monoclinic crystal system with perfect basal cleavage.
Formation & geological history
Forms through hydrothermal alteration of aluminous rocks, typically in low-grade metamorphic or volcanic environments.
Uses & applications
Used in ceramics, refractories, insecticides, and as a filler in paint, paper, and rubber.
Geological facts
Pyrophyllite is often carved into ornamental objects in China, resembling soapstone due to its softness and texture.
Field identification & locations
Identified by its extreme softness, greasy feel, and radiating rosette crystal habits; found globally in hydrothermal veins and altered tuffs.
