Stibarsen

antimony

arsenolite

Formula: SbAs
Native elements and alloys, arsenic group
Specific gravity: 5.8 to 6.2
Hardness: 3 to 4
Streak: Greyish black
Colour: Tin-white tarnishing to grey
Environments:

Pegmatites
Hydrothermal environments most common

Stibarsen occurs most commonly in hydrothermal veins, but also in pegmatites , associated with arsenic, arsenolite, antimony, kermesite, stibnite, stibiconite, cervantite, sphalerite, siderite, calcite and quartz.

Common impurities: Bi,Fe,S

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