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Pyrochlore Katophorite & Ferrokentbrooksite

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SER120311

Pyrochlore Katophorite & Ferrokentbrooksite

Description Tabs

Description
Locality: 
Água de Pau Volcano, São Miguel Island, Azores District, Portugal
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.1 × 5.4 × 4.5 cm
Description

a large matrix item full of red bipyramidal crystals of pyrochlore, some black katophorite and yellow crusts of ferrokentbrooksite; good possibility to reduce and make several micro items

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

Katophorite

Variety Of: 

Katophorite Root Name

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

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