Thortveitite
Sc₂Si₂O₇
Silicates
Hardness —
· Monoclinic
Photo: Salah Rashad Zaqzoq · CC BY-SA 4.0
Abenakiite-(Ce)
Na₂₆Ce₆(Si₆O₁₈)(PO₄)₆(CO₃)₆(SO₂)O
Cyclosilicate mineral
Properties
- Chemical formula
- Na₂₆Ce₆(Si₆O₁₈)(PO₄)₆(CO₃)₆(SO₂)O
- Group
- Silicates
- Crystal system
- Trigonal
- Hardness (Mohs)
- —
- Color
- Brown
- Luster
- —
- Streak
- White
- Density
- —
- Cleavage
- —
- Fracture
- —
- Tenacity
- —
- Crystal habit
- —
- Transparency
- —
- Space group
- R-3
- Fluorescence
- —
- Magnetism
- —
- Radioactivity
- —
- Refractive index
- —
- Optical character
- —
- Birefringence
- —
- Pleochroism
- —
- Strunz classification
- 9.CK.10
- Dana classification
- —
- IMA status
- Approved mineral and/or valid name (A)
- IMA symbol
- Abk-Ce
- Locality
- 🇨🇦 Poudrette quarry
- Type locality
- —
- Discovery year
- —
Etymology
Named after ethnic group
Source: Wikidata
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