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Römerite Metavoltine Halotrichite & Magnesiocopiapite

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SMM730541

Römerite Metavoltine Halotrichite & Magnesiocopiapite

Description Tabs

Description
Locality: 
Argentiera Della Nurra Mine, Sassari Province, Sardinia, Italy
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 2.5 × 2 cm
Description

A nice group of brownish-orange römerite crystals, surrounded by bright yellow metavoltine and white tufts of halotrichite. In the sample there is also a good group of pale/yellow crystals of magnesiocopiapite.

Boxed with Label
Mineral Data
What's on the rock

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

Metavoltine

Formula: 
Na6K2FeFe6(SO4)12O2·18H2O
Strunz: 
7.DF.35
Hardness: 
2.5
Type Locality: 
Zagh Mine (Tangeh Zagh mine; Madeni Zakh), Haji Abad town, Bandar Abbas (Bandar-e Abbas), Bandar-Abbas County, Hormozgan Province, Iran

Halotrichite

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

Magnesiocopiapite

Formula: 
MgFe3+4(SO4)6(OH)2·20H2O
Strunz: 
7.DB.35
Hardness: 
2.5 - 3.0
Type Locality: 
Blythe, Riverside Co., California, USA

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