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Formula: KBF4
Fluoride, boron-bearing mineral
Crystal System: Orthorhombic, becomes cubic above 273°C
Specific gravity: 2.9 calculated
Colour: Colourless to white, yellowish to reddish when impure, colourless in transmitted light
Solubility: Slightly soluble in water
Environments
Localities
At the type locality, Mount Vesuvius, Somma-Vesuvius Complex, Naples, Campania, Italy, avogadrite occurs in
fumeroles as minute octagonal crystals and dense crusts. Associated minerals include
sassolite, malladrite and
hieratite
(HOM, Mindat).
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