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Pyrochlore Astrophyllite & Katophorite

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SER503991

Pyrochlore Astrophyllite & Katophorite

Description Tabs

Description
Locality: 
Água de Pau Volcano, São Miguel Island, Azores District, Portugal
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.1 × 5 × 2.8 cm
Description

A large and rich specimen featuring a large vug with sanadinite crystals and several red-orange pyrochlore crystals; other vugs that show red pyrochlore, orange astrophyllite and black katophorite; self collected on 2013

Mineral Data
What's on the rock

Pyrochlore

Synonym Of: 

Pyrochlore Group

Formula: 
A2Nb2(O,OH)6Z
Strunz: 
4
Hardness: 
5 - 5.5
Group Parent: 
Pyrochlore Group

Astrophyllite

Formula: 
(K,Na)3(Fe,Mn)7Ti2Si8O24(O,OH)7
Strunz: 
9.DC.05
Crystal System: 
Triclinic
Hardness: 
3.0
Streak: 
Golden
Type Locality: 
Låven (Skådön; Lamö; Lamanskjaer), Langesundsfjorden, Larvik, Vestfold, Norway

Katophorite

Variety Of: 

Katophorite Root Name

Formula: 
A(CaNa)(Z2+4Z3+)(AlSi7O22)(OH,F,Cl)2
Hardness: 
0.0