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Adranosite & Alunite

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SMM563951

Adranosite & Alunite

Type Locality
Analysed

Description Tabs

Description
Locality: 
La Fossa Crater, Vulcano Island, Messina Province, Sicily, Italy
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 2 × 1 cm
Description

Nice specimen of adranosite, rich of snow-white crystals, gathered in divergent spherical aggregates, from the type locality. Analysed by one of the authors.

Boxed with Label
Mineral Data
What's on the rock

Adranosite

Synonym Of: 

Adranosite-(Fe)

Formula: 
(NH4)4NaFe3+2(SO4)4Cl(OH)2
Hardness: 
0.0

Adranosite-(Al)

Formula: 
(NH4)4NaAl2(SO4)4Cl(OH)2
Hardness: 
0.0

Alunite

Formula: 
KAl3(SO4)2(OH)6
Strunz: 
7.BC.10
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Allumiere Quarries, Tolfa, Rome Province, Latium, Italy

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