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Formula: TlPb4(Sb7As2)Σ=9S18
Sulphosalt, sartorite group,
thallium-, antimony- and
arsenic- bearing mineral
Crystal System: Triclinic
Specific gravity: 5.355 calculated
Streak: Black
Colour: Lead-grey
Environments
Sedimentary environments
Metamorphic environments
Hydrothermal environments
Boscardinite was found on a museum specimen in the mineralogical collection of the Museo di Storia Naturale e del
Territorio, Pisa, Italy, and it was approved as a new mineral in 2011.
Localities
At Jas Roux, La Chapelle-en-Valgaudemar, Gap, Hautes-Alpes, Provence-Alpes-Côte d'Azur, France, boscardinite is
associated with stibnite and smithite
(HOM).
At the type locality, the Monte Arsiccio mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy,
in the baryte–pyrite-iron oxides
deposit, metamorphic rocks outcrop through non-metamorphic sedimentary formations. The deposit is characterised by a
distinct zoning, with pyrite and baryte
at the bottom, and iron oxides (magnetite and
hematite) and baryte at the top,
with accessory sulphides and sulphosalts. The mineralisation is hosted at the contact between
phyllite and dolostone.
Boscardinite was identified in a sample occurring in a quartz vein
embedded in dolostone, associated with
zinkenite. Other sulphosalts identified in the veins crosscutting the
dolostone were mercury-rich
andorite, boulangerite,
chabournéite, jamesonite,
robinsonite and zinkenite.
Boscardinite occurs as a millimeter-sized lead-grey mass with a metallic lustre
(CM 50.235-251).
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