Thortveitite
Sc₂Si₂O₇
Silicates
Hardness —
· Monoclinic
Photo: Henk Smeets - Tomeik Minerals · CC BY 4.0
Vinogradovite
Na₄Ti₄(Si₂O₆)₂[(Si,Al)₄O₁₀]O₄ * (H₂O,Na,K)₃
Single chain inosilicate mineral
Properties
- Chemical formula
- Na₄Ti₄(Si₂O₆)₂[(Si,Al)₄O₁₀]O₄ * (H₂O,Na,K)₃
- Group
- Silicates
- Crystal system
- Monoclinic
- 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.DB.25
- Dana classification
- 68.1.2.1
- IMA status
- Grandfathered mineral (G)
- IMA symbol
- Vgd
- Locality
- 🇷🇺 Lepkhe-Nel'm mountain
- Type locality
- —
- Discovery year
- —
Etymology
Named after Aleksander P. Vinogradov
Source: Wikidata
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