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Formula: Ag1-xSbx (x=0.09 to 0.16)
Alloy of silver and antimony
Crystal System: Hexagonal
Specific gravity: 10.0 measured, 10.12 calculated
Hardness: 3½
Colour: Silver
Common impurities: Hg,Ni,As
Environments
Allargentum occurs in high grade
silver-antimony
ores, associated with
breithauptite,
domeykite,
dyscrasite, kutinaite,
silver and stephanite
(Mindat, HOM, Dana, Webmin).
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