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Formula: PbCaAlF7
Fluoride
Crystal System: Monoclinic
Specific gravity: 5.095 calculated
Hardness: 2 to 3
Streak: White
Colour: Colourless
Luminescence: No fluorescence under long wave or short wave UV
Environments
Manuelarossite is a new mineral, approved in 2022 and to date (May 2025) reported only from the type
locality.
Localities
At the type locality, Vesuvius fumaroles, Metropolitan City of Naples, Campania, Italy, manuelarossiite
was found in a specimen from a fumarole formed subsequent to the 1944 eruption of the Vesuvius volcano; it occurs as
very rare tabular crystals, up to 0.06 × 0.04 × 0.015 mm3, in the vugs of volcanic
scoria, associated with
cerussite. In the same scoria
where manuelarossiite was found, anglesite,
artroeite, atacamite,
calcioaravaipaite,
cerussite, challacolloite,
cotunnite, hephaistosite,
matlockite, napoliite and
susannite were identified. Manuelarossiite is colourless with a
white streak and adamantine lustre.
(MM Published online by Cambridge University Press
link)
.
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