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Penkvilksite & Labuntsovite-Mn

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GMN538085

Penkvilksite & Labuntsovite-Mn

Description Tabs

Description
Locality: 
Mont Saint-Hilaire, Montérégie, Québec, Canada
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
1.6 × 1.1 × 0.6 cm
Description

Very nice crystal cluster of white, translucent tabular crystals on matrix.

Associated with brownish labuntsovite Mn cluster.

Mineral Data
What's on the rock

Penkvilksite

Formula: 
Na4Ti2Si8O22·4H2O
Strunz: 
9.EA.60
Hardness: 
5.0
Colour: 
White
Type Locality: 
Yubileinaya pegmatite (Yubileinoye; Jubilejnaja), Karnasurt Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia...

Labuntsovite-Mn

Formula: 
Na4K4(Ba,K)2Mn2+(Ti,Nb)8(Si4O12)4(O,OH)8·10-12H2O
Strunz: 
9.CE.30e
Hardness: 
6.0
Type Locality: 
Pegmatite No. 19, Kuftn'yun Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia...

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