Vermiculite
Mg₀.₇(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ * 8H₂O
Smectite, phyllosilicate mineral
Properties
- Chemical formula
- Mg₀.₇(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ * 8H₂O
- Group
- Silicates
- Crystal system
- Monoclinic
- Hardness (Mohs)
- 1,3
- Color
- Colorless
- Luster
- —
- Streak
- —
- Density
- 2,55 g/cm³
- Cleavage
- —
- Fracture
- —
- Tenacity
- —
- Crystal habit
- —
- Transparency
- —
- Space group
- —
- Fluorescence
- —
- Magnetism
- —
- Radioactivity
- —
- Refractive index
- —
- Optical character
- —
- Birefringence
- —
- Pleochroism
- —
- Strunz classification
- 9.EC.50
- Dana classification
- 71.2.
- IMA status
- Grandfathered mineral (G)
- IMA symbol
- Vrm
- Locality
- 🇺🇸 Millbury
- Type locality
- —
- Discovery year
- —
Etymology
Named after worm
Source: Wikidata
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