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Szomolnokite Römerite Kornelite Halotrichite Coquimbite & Voltaite

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SCH178759

Szomolnokite Römerite Kornelite Halotrichite Coquimbite & Voltaite

Description Tabs

Description
Locality: 
Rio Tinto Mines, Huelva, Andalusia, Spain
Size Range: 
Cabinet (10-18 cm)
Size: 
15.9 × 9 × 6.5 cm
Description

A large superb, undamaged szomolnokite stalactite associated with several sulphates as listed and maybe a couple more if you looking closely like chalcanthite and copiapite. Although, obviously there is not such thing as a doubly-terminated stalactite, the base end shows some kind of recrystalization as there are several voltaite crystals plus a rich coverage of römerite crystals and some minor pale purple coquimbite groups. There are some excellent römerite crystal clusters scattered for all the stalactite associated with halotrichite sprays which are dusting the whole surface. In a few crevices, the kornelite forms white, pure tufts instead of the usual purple sprays (which are mixture with coquimbite). The green szomolnokite color is thought to be due to a high Zn content.

Mineral Data
What's on the rock

Szomolnokite

Formula: 
FeSO4·H2O
Strunz: 
7.CB.05
Hardness: 
2.5
Type Locality: 
Smolník (Schmöllnitz; Szomolnok), Gelnica Co., Košice Region, Slovakia

Römerite

Formula: 
Fe2+Fe3+2(SO4)4·14H2O
Strunz: 
7.CB.75
Hardness: 
3.0 - 3.5
Type Locality: 
Rammelsberg Mine, Rammelsberg, Goslar, Harz, Lower Saxony, Germany

Kornelite

Formula: 
Fe2(SO4)3·7H2O
Strunz: 
7.CB.60
Hardness: 
0.0
Type Locality: 
Smolník (Schmöllnitz; Szomolnok), Gelnica Co., Košice Region, Slovakia

Halotrichite

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

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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