Boulangerite
Pb₅Sb₄S₁₁
Sulfides
Hardness 2,75
· Monoclinic
Photo: Wikimedia Commons
Violarite
Fe²⁺Ni³⁺₂S₄
Spinel, sulfide mineral
Properties
- Chemical formula
- Fe²⁺Ni³⁺₂S₄
- Group
- Sulfides
- Crystal system
- Cubic
- Hardness (Mohs)
- —
- Color
- Purple
- Luster
- —
- Streak
- —
- Density
- —
- Cleavage
- —
- Fracture
- —
- Tenacity
- —
- Crystal habit
- —
- Transparency
- —
- Space group
- Fd-3m
- Fluorescence
- —
- Magnetism
- —
- Radioactivity
- —
- Refractive index
- —
- Optical character
- —
- Birefringence
- —
- Pleochroism
- —
- Strunz classification
- 2.DA.05
- Dana classification
- 2.10.1.8
- IMA status
- Grandfathered mineral (G)
- IMA symbol
- Vio
- Locality
- 🇺🇦 Kryvbas
- Type locality
- —
- Discovery year
- —
Etymology
Named after violet
Source: Wikidata
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