Avogadrite ((K,Cs)BF4) is a potassium-caesium tetrafluoroborate in the halide class. Avogadrite crystallizes in the orthorhombic system (space group Pnma) with cell parameters a 8.66 Å, b 5.48 Å and c Å 7.03.
History
The mineral was discovered by the
Italy mineralogist Ferruccio Zambonini
in 1926. He analyzed several samples from the volcanic fumaroles close to
Mount Vesuvius and from the
Lipari islands. In nature, it can only be found as a sublimation product around
Volcano .
He named it after the Italian scientist
Amedeo Avogadro (1776–1856).
Bibliography
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Palache, P.; Berman H.; Frondel, C. (1960). " Dana's System of Mineralogy, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. (Seventh Edition)" John Wiley and Sons, Inc., New York, pp. 97-98.
