Hrabákite

hrabakite

tucekite

stephanite

nickeline

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Formula: Ni9PbSbS8
Sulphosalt of nickel, lead and antimony, hauchecornite group
Specific gravity: 6.37 calculated
Hardness: About 5 to 6
Colour: Grey with a brownish tint
Environments

Hydrothermal environments

Hrabákite is a new mineral, approved in 2020 and to date (April 2022) reported only from the type locality.

Localities

At the type locality, Uranium Mine No. 9, Háje, Příbram District, Central Bohemian Region, Czech Republic, hrabákite was found in sideritesphalerite gangue with minor dolomiteankerite at the dump. Hrabákite is associated with lead-rich tučekite, magnesium-rich silver, stephanite, nickeline, millerite, gersdorffite, sphalerite and galena. The hrabákite occurs as rare prismatic crystals up to 120 μm in size and as grains (MM 85.2.189-196).

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