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Thortveitite & Todorokite

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SHS746262

Thortveitite & Todorokite

Description Tabs

Description
Locality: 
Varenche Mine, Saint-Barthélemy, Nus, Aosta Valley, Italy
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 2.6 × 1.7 cm
Description

Thortveitite and todorokite on matrix

Mineral Data
What's on the rock

Thortveitite

Formula: 
(Sc,Y)2Si2O7
Strunz: 
9.BC.05
Crystal System: 
Monoclinic
Hardness: 
6.0 - 7.0
Streak: 
white
Type Locality: 
Ljoslandsknipan (Thortveitittgruva), Knipan (Knipane), Ljosland, Iveland, Aust-Agder, Norway

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