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Todorokite

Tabi

Tabi, Numazu city, Shizuoka pref., Japan

Source for manganese

Todorokite

Field of view: 5 mm. Todorokite associated with braunite and pyrolusite. The group of plumose silver-white crystals is todorokite. The fine black grains at the left are braunite. The earthy black parts with a dull luster in the interstices of braunite are pyrolusite.

Recovered from a Fe-Mn deposit by low temperature hydrothermal activity associated with andesitic pyroclastic rocks.

Todorokite from this location was described in 1970.

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