Thortveitite
Sc₂Si₂O₇
Silicates
Hardness —
· Monoclinic
Photo: Leon Hupperichs · CC BY-SA 3.0
Chevkinite-(Ce)
(Ce,La,Ca,Th)₄(Fe²⁺,Mg)(Fe²⁺,Ti,Fe³⁺)₂(Ti,Fe³⁺)₂(Si₂O₇)₂O₈
Sorosilicate mineral
Properties
- Chemical formula
- (Ce,La,Ca,Th)₄(Fe²⁺,Mg)(Fe²⁺,Ti,Fe³⁺)₂(Ti,Fe³⁺)₂(Si₂O₇)₂O₈
- Group
- Silicates
- Crystal system
- Monoclinic
- Hardness (Mohs)
- —
- Color
- —
- Luster
- —
- Streak
- —
- Density
- —
- Cleavage
- —
- Fracture
- —
- Tenacity
- —
- Crystal habit
- —
- Transparency
- —
- Space group
- C2/m
- Fluorescence
- —
- Magnetism
- —
- Radioactivity
- —
- Refractive index
- —
- Optical character
- —
- Birefringence
- —
- Pleochroism
- —
- Strunz classification
- 9.BE.70
- Dana classification
- 56.2.8.1
- IMA status
- Renamed mineral (Rn)
- IMA symbol
- Cvk-Ce
- Locality
- 🇷🇺 Ilmen Nature Reserve
- Type locality
- —
- Discovery year
- —
Etymology
Named after Konstantin Chevkin
Source: Wikidata
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