Adranosite

adranosite

aiolosite

bismuthinite

sassolite

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Formula: (NH₄)₄NaAl₂(SO₄)₄Cl(OH)
Anhydrous sulphate containing hydroxyl
Crystal System: Tetragonal
Specific gravity: 2.15 measured, 2.176 calculated
Streak: White
Colour: Colourless, white
Luminescence: Not fluorescent under UV Solubility:
Common impurities: K
Environments

Fumeroles

Localities

At the type locality, La Fossa crater, Vulcano Island, Lipari, Eolie Islands, Metropolitan City of Messina, Sicily, Italy, adranosite occurs in an active medium-temperature (~250°C) intracrater fumarole on pyroclastic breccia in association with aiolosite, alunite, anhydrite, bismuthinite, sassolite, demicheleite-(Br), demicheleite-(Cl) and demicheleite-(I). In addition, in the same environment, other very unusual species containing ammonium also are present, such as godovikovite and pyracmonite. Besides sulphates, there are also ammonium-bearing complex chlorides that contain heavy metals, for instance panichiite and brontesite and an ammonium bismuth chloride.
Adranosite forms aggregates of colourless to white acicular crystals up to 0.3 mm in length, with pointed terminations (CM 48.315-321).

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