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Wavellite Limonite & Senegalite

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CLB33466

Wavellite Limonite & Senegalite

collector's own find
Type Locality

Description Tabs

Description
Locality: 
Mount Kourou Diakouma, Saraya, Kedougou, Senegal
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 9.5 × 8 cm
Largest Crystal: 
0.30cm
Description

Very unusual free standing wavellite crystals (wavellite crystals are much rarer than the typical botryoidal aggregates !).

The whole specimen is covered with thousands of small wavellite crystals which themselves are covered again by limonite. There are only very few wavellite crystal specimen from the Kourou Diakouma mountain. 

The crystals are sitting on a very fine line of turquoise or augelite and there's also senegalite present (type locality!). Better in nature (darker reddish brown).

Mineral Data
What's on the rock

Wavellite

Formula: 
Al3(PO4)2(OH,F)3·5H2O
Strunz: 
8.DC.50
Hardness: 
3.5 - 4.0
Streak: 
White.
Type Locality: 
High Down Quarry, Filleigh, North Devon, Devon, England, UK

Senegalite

Formula: 
Al2(PO4)(OH)(OH)2·H2O
Strunz: 
8.DE.05
Hardness: 
5.5
Type Locality: 
Mount Kourou Diakouma (Kouroudiako), Saraya, Falémé River basin, Tambacounda Region, Senegal

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