Sewardite
CaFe³⁺₂(AsO₄)₂(OH)₂
Arsenate mineral
Properties
- Chemical formula
- CaFe³⁺₂(AsO₄)₂(OH)₂
- Group
- Phosphates
- Crystal system
- —
- Hardness (Mohs)
- —
- Color
- Red
- Luster
- —
- Streak
- Brown
- Density
- —
- Cleavage
- —
- Fracture
- —
- Tenacity
- —
- Crystal habit
- —
- Transparency
- —
- Space group
- —
- Fluorescence
- —
- Magnetism
- —
- Radioactivity
- —
- Refractive index
- —
- Optical character
- —
- Birefringence
- —
- Pleochroism
- —
- Strunz classification
- 8.BH.30
- Dana classification
- —
- IMA status
- Approved mineral and/or valid name (A)
- IMA symbol
- Sew
- Locality
- 🇳🇦 Tsumeb Mine
- Type locality
- —
- Discovery year
- —
Etymology
Named after Terry M. Seward
Source: Wikidata
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