A Geoscience Digital Image Library

DescriptionPyrophyllite, Al2Si4O10(OH)2 (aluminum silicate hydroxide), is an early stage metamorphic mineral and is quite common. Pyrophyllite exfoliates when water is driven off upon heating, leaving a flaky mass. Pyrophyllite and talc are isomorphous. Pyrophyllite gets its name from the Greek words for fire and leaf, as in “fire-leaf”.
LocationUSA ▹ California ▹ Mariposa
PhotographerShannon Heinle. 2002-02-11.
CollectionUniversity of North Dakota Mineralogy Collection #1511.
Key wordspyrophyllite, talc, silicate, metamorphic mineral
Tech details492 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number2358