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Tvrdýite

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JYJ719466

Tvrdýite

Description Tabs

Description
Locality: 
Hagendorf South Pegmatite, Bavaria, Germany
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.6 × 1.5 × 0.8 cm
Description

This specimen was SEM-EDS analysed and is clearly the Al dominant analogue tvrdyite. Crystals pale brownish.  Analysis attached.

Mineral Data
What's on the rock

Tvrdýite

Formula: 
Fe2+Fe23+ Al3(PO4)4(OH)5(H2O)4·2H2O
Group Parent: 
Beraunite Group
Crystal System: 
Monoclinic
Hardness: 
3 - 4
Colour: 
Silvery to olive-greyish-green
Streak: 
Greyish-white
Type Locality: 
Huber Stock, Krásno , Horní Slavkov, Bohemia, Czech Republic
Isostructural with: 
Beraunite
Analysis
Analysis Report - only: Tvrdýite
Analysis Report - only: Tvrdýite
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