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Tetraferriannite

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SKY830416

Tetraferriannite

Rare Mineral

Description Tabs

Description
Locality: 
Bancroft Area, Ontario, Canada
Class: 
Single Crystal
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 2.7 × 0.1 cm
Description

Outstanding very thin black single crystal of the rare tetraferriannite.

Tetraferriannite is a member of the phlogopite group.

Ex Vandenbroucke Museum collection from Waregem, Belgium.

Mineral Data
What's on the rock

Tetraferriannite

Formula: 
KFe2+3((Fe3+,Al)Si3O10)(OH)2
Strunz: 
9.EC.20
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.0
Type Locality: 
Dales Gorge member Fe-formation, Wittenoom (Wittenoom Gorge), Ashburton Shire, Western Australia, Australia
Not Sold

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