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Ranciéite & Todorokite

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UVM687316

Ranciéite & Todorokite

Description Tabs

Description
Locality: 
Winterberg Quarry, Iberg, Bad Grund, Lower Saxony, Germany
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.4 × 2.8 × 4.3 cm
Description

Intergrown crystalline masses of rancieite and todorokite.

Mineral Data
What's on the rock

Ranciéite

Formula: 
(Ca,Mn)Mn4O9·3H2O
Strunz: 
4.FL.40
Crystal System: 
Hexagonal
Hardness: 
2.5 - 3.0
Type Locality: 
Le Rancié Mine, Sem, Vicdessos, Ariège, Midi-Pyrénées, France

Todorokite

Formula: 
(Ca,K,Na,Mg,Ba,Mn)(Mn,Mg,Al)6O12·3H2O
Strunz: 
4.DK.10
Hardness: 
1.5
Type Locality: 
Todoroki mine, Yoichi, Shiribeshi Province, Hokkaido, Japan

Seller Information

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