mineral
Arsenopyrite
Arsenopyrite (FeAsS)
AI-generated identification · may be incorrectHardness: 5.5-6 (Mohs scale); Color: Tin-white to steel-gray, often with a brassy yellow tint; Luster: Metallic; Crystal Structure: Monoclinic (pseudo-orthorhombic); Cleavage: Distinct; Specific Gravity: 5.9–6.2.
- Hardness
- 5
- Color
- Tin-white to steel-gray, often with a brassy yellow tint
- Luster
- Metallic
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Physical properties
Hardness: 5.5-6 (Mohs scale); Color: Tin-white to steel-gray, often with a brassy yellow tint; Luster: Metallic; Crystal Structure: Monoclinic (pseudo-orthorhombic); Cleavage: Distinct; Specific Gravity: 5.9–6.2.
Formation & geological history
Formed in high-temperature hydrothermal veins, pegmatites, and contact metamorphic environments. Most deposits are associated with volcanic activity and hydrothermal fluids rich in arsenic and iron.
Uses & applications
Primary ore of arsenic; used in the production of herbicides, pesticides, and specialized alloys. Occasionally collected as mineral specimens, though toxic if handled improperly.
Geological facts
When struck with a hammer, it emits a distinct garlic-like odor due to the release of arsenic vapors. It is known as 'mispickel' in older geological texts.
Field identification & locations
Identify by its metallic luster, high density (heavy for its size), and garlic smell when crushed or heated. Common in mining districts of Germany, China, and Canada. Collectors should store it in dry conditions to prevent oxidation.
