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Ferrokentbrooksite & Narsarsukite

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CHP1069458

Ferrokentbrooksite & Narsarsukite

Classic Locality

Description Tabs

Description
Locality: 
Água de Pau Volcano, São Miguel Island, Azores District, Portugal
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.8 × 2.7 × 2.3 cm
Description

specimen with some brownish crystals of ferrokentbrooksite with associate light pink crystal of narsarsukite on matrix.

c. 8765

Mineral Data
What's on the rock

Ferrokentbrooksite

Formula: 
Na15Ca6(Fe,Mn)3Zr3NbSi25O73(O,OH,H2O)3Cl2
Strunz: 
9.CO.10
Crystal System: 
Trigonal
Hardness: 
5.0 - 6.0
Streak: 
white
Type Locality: 
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada

Narsarsukite

Formula: 
Na4(Ti,Fe)2[Si8O20](O,OH,F)2
Strunz: 
9.DJ.05
Hardness: 
7.0
Type Locality: 
Narsaarsuk pegmatite (Narssârssuk pegmatite), Narsaarsuk Plateau, Igaliku (Igaliko), Narsaq, Kujalleq, Greenland

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