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Peterandresenite

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JYJ159998

Peterandresenite

Description Tabs

Description
Locality: 
Tuften, Tvedalen, Larvik, Vestfold og Telemark, Norway
Size Range: 
Thumbnail (1-3cm)
Size: 
1 × 0.8 × 0.8 cm
Description

Very good crystals of the first natural hexaniobate mineral peterandresenite. It contains Nb and Mn2+.
Attached a view of the structure, part of my work at university.

Mineral Data
What's on the rock

Peterandresenite

Formula: 
Mn4Nb6O19·14H2O
Hardness: 
2.0 - 2.5
Colour: 
Orange
Type Locality: 
A/S Granit Quarry, Tuften (Tuften 1 Quarry; Tuften 2 Quarry), Tvedalen, Larvik, Vestfold, Norway