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Vlodavetsite & Thermessaite

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SMM598652

Vlodavetsite & Thermessaite

Rare Mineral

Description Tabs

Description
Locality: 
La Fossa Crater, Vulcano Island, Messina Province, Sicily, Italy
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.3 × 1 × 0.8 cm
Description

The vlodavetsite is an extremely rare mineral found in its type locality, the volcanic area of  the Kamchatka peninsula and now exceptionally in tabular milk white crystals in the La Fossa crater, Vulcano. Here it is together with fine, colorless, glassy, crystals of  thermessaite. A rare sample.

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Mineral Data
What's on the rock

Vlodavetsite

Formula: 
AlCa2(SO4)2F2Cl·4H2O
Strunz: 
7.DF.40
Crystal System: 
Tetragonal
Hardness: 
0.0
Type Locality: 
Second scoria cone, Northern Breakthrough (North Breach), Great Fissure eruption (Main Fracture), Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia...

Thermessaite

Formula: 
K2(AlF3)(SO4)
Strunz: 
3.CG.25
Hardness: 
0.0
Streak: 
white
Type Locality: 
La Fossa crater, Vulcano Island, Lipari, Eolie Islands (Aeolian Islands), Messina Province, Sicily, Italy

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