Magnesiofoitite
Nasu-Shiobara city, Tochigi pref., Japan
Diameter: 5 mm. Foitite-Magnesiofoitite associated with pyrophyllite. The gray globules are radial groups of foitite-magnesiofoitite fibers. The center of a globule is foitite, and the slightly darker margin of a globule is magnesiofoitite. The massive white host is aggregate of fine pyrophyllite crystals.
Recovered from a pyrophyllite deposit formed by hydrothermal alteration of rhyolite.
Magnesiofoitite from this location was described in 1982 as dravite and in 1995 as magnesiofoitite.
Other localities
- Momura (Pyrophyllite, Globular)
- Kyonosawa (Pyrophyllite, Fibrous)