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Voltaite Coquimbite & Halotrichite

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CSL133042

Voltaite Coquimbite & Halotrichite

Description Tabs

Description
Locality: 
Meggen Mine, Lennestadt, Sauerland, North Rhine - Westphalia, Germany
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.4 × 1.3 cm
Description

Great sulfate assamblage from Meggen mine. The specimen features dark green octahedrons of voltaite, pale purple, poorly crytsalized coquimbite and hair like acicular halotrichite. Some yellow, earthy copiapite is also present on the specimen.

Mineral Data
What's on the rock

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

Coquimbite

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

Halotrichite

Formula: 
FeAl2(SO4)4·22H2O
Strunz: 
7.CB.85
Hardness: 
1.5 - 2.0
Streak: 
White
Loranth Minerals

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