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Therasiaite

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FRE581412

Therasiaite

Type Locality

Description Tabs

Description
Locality: 
La Fossa Crater, Vulcano Island, Messina Province, Sicily, Italy
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1 × 2 × 1.5 cm
Description

Brown microcrystals of therasiaite up to about 0.05 mm on adranosite in a hole of pyroclastic breccia. Therasiate is an exceedingly rare species, exclusive for the Vulcano fumaroles. To indefinitely preserve the mineral that is deliquescent, the specimen was sealed in a box under argon atmosphere as soon as it was trimmed and photographed. The microcrystals can be observed under a high-power microscope through the “optical quality” transparent cover.

Mineral Data
What's on the rock

Therasiaite

Formula: 
(NH4)3KNa2Fe2+Fe3+(SO4)3Cl5
Hardness: 
0.0
Type Locality: 
La Fossa crater, Vulcano Island, Lipari, Eolie Islands (Aeolian Islands), Messina Province, Sicily, Italy

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