Thortveitite
Sc₂Si₂O₇
Silicates
Hardness —
· Monoclinic
Photo: jsj1771 · CC BY 2.0
Volkonskoite
Ca₀.₃(Cr,Mg,Fe)₂((Si,Al)₄O₁₀)(OH)₂ * 4H₂O
Smectite, phyllosilicate mineral
Properties
- Chemical formula
- Ca₀.₃(Cr,Mg,Fe)₂((Si,Al)₄O₁₀)(OH)₂ * 4H₂O
- Group
- Silicates
- Crystal system
- —
- Hardness (Mohs)
- —
- Color
- —
- Luster
- —
- Streak
- —
- Density
- —
- Cleavage
- —
- Fracture
- —
- Tenacity
- —
- Crystal habit
- —
- Transparency
- —
- Space group
- —
- Fluorescence
- —
- Magnetism
- —
- Radioactivity
- —
- Refractive index
- —
- Optical character
- —
- Birefringence
- —
- Pleochroism
- —
- Strunz classification
- 9.EC.40
- Dana classification
- —
- IMA status
- Redefined mineral (Rd)
- IMA symbol
- Vkn
- Locality
- —
- Type locality
- —
- Discovery year
- —
Etymology
Named after Pyotr Mikhailovich Volkonsky
Source: Wikidata
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