Tsugaruite

tsugaruite

jordanite

marcasite

wurtzite

Images

Formula: Pb₂₈As₁₅S₅₀Cl
Sulphosalt, arsenic-bearing mineral
Crystal System: Orthorhombic
Specific gravity: 6.83 calculated
Hardness: 2½ to 3
Streak: Lead-grey
Colour: Lead-grey
Environments

Hydrothermal environments

Tsugaruite is a very rare arsenic-bearing mineral.

Localities

At the type locality, the Yunosawa mine, Ikarigaseki, Minamitsugaru District, Aomori Prefecture, Japan, tsugaruite was found as tabular crysstals to 2 mm in a thin hydrothermal baryte veinlet. Associated minerals include jordanite, wurtzite, marcasite and galena. The jordanite formed earlier than the tsugaruite (MM 62.793-799, AM 84.992).

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