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Formula: TlAg3Au3Sb7S6
Sulphosalt of thallium, silver,
gold and antimony
Crystal System: Triclinic
Specific gravity: 5.693 calculated
Hardness: 3
Streak: Black
Colour: Black
Environments
Thunderbayite is a new mineral, approved in 2020 and to date (May 2023) reported only from the type locality.
Localities
At the type locality, the Hemlo gold deposit, Bomby Township, Thunder Bay District, Ontario, Canada,
thunderbayite occurs as very rare anhedral rims up to 70 μm across in contact with
aurostibite and associated spatially with
stibarsen, biagioniite and
native gold in a calcite matrix
(MM 84.6.805-812).
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