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Coquimbite & Voltaite

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SCH509147

Coquimbite & Voltaite

Description Tabs

Description
Locality: 
Rio Tinto Mines, Huelva, Andalusia, Spain
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 1.9 × 1.4 cm
Description

Very good small specimen of bright purple coquimbite crystals nicely accented by several sulphates, mainly voltaite. 

Mineral Data
What's on the rock

Coquimbite

Formula: 
Fe2-xAlx(SO4)3·9H2O, x ~0.5
Strunz: 
7.CB.55
Hardness: 
2.5
Streak: 
white
Type Locality: 
Coquimbo Region, Chile

Voltaite

Formula: 
K2Fe2+5Fe3+3Al(SO4)12·18H2O
Strunz: 
7.CC.25
Hardness: 
3.0 - 3.5
Type Locality: 
Solfatara di Pozzuoli, Pozzuoli, Phlegrean Fields, Naples Province, Phlegrean Volcanic Complex, Campania, Italy
schani

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