Jordanite

jordanite

guettardite

semseyite

geocronite

Images

Formula: Pb₁₄(As,Sb)₆S₂₃
Sulpharsenite, jordanite homologous series group, forms a series with geocronite
Crystal System: Monoclinic
Specific gravity: 6.4 calculated (HOM)
Hardness: 3
Streak: Black
Colour: Lead-grey
Common impurities: Tl
Environments:

Metamorphic environments
Hydrothermal environments

Jordanite occurs in metamorphosed lead-arsenic occurrences in dolostone (Webmin), associated with tennantite, seligmannite, dufrénoysite, boulangerite, semseyite, quadratite, guettardite, zinkenite, tsugaruite, kirkiite, enargite, sphalerite and galena. It also occurs in “black smoker” undersea chimneys (HOM).

Localities

At the Yunosawa and Okkope mines, Aomori Prefecture, Japan, jordanite occurs in epithermal (low-temperature) veins (HOM).

At Sacaramb, Romania, jordanite occurs in epithermal gold - quartz veins (HOM).

At the type locality, the Lengenbach quarry, Fäld, Binn, Goms, Valais, Switzerland, jordanite occurs in metamorphosed lead-arsenic occurrences in dolostone (HOM).

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