Thortveitite
Sc₂Si₂O₇
Silicates
Hardness —
· Monoclinic
Quadridavyne
[(Na,K)₆Cl₂][Ca₂Cl₂][(Si₆Al₆O₂₄)]
Tectosilicate mineral
Properties
- Chemical formula
- [(Na,K)₆Cl₂][Ca₂Cl₂][(Si₆Al₆O₂₄)]
- Group
- Silicates
- Crystal system
- Hexagonal
- Hardness (Mohs)
- —
- Color
- —
- Luster
- —
- Streak
- —
- Density
- —
- Cleavage
- —
- Fracture
- —
- Tenacity
- —
- Crystal habit
- —
- Transparency
- —
- Space group
- P6₃/m
- Fluorescence
- —
- Magnetism
- —
- Radioactivity
- —
- Refractive index
- —
- Optical character
- —
- Birefringence
- —
- Pleochroism
- —
- Strunz classification
- 9.FB.05
- Dana classification
- 76.2.5.12
- IMA status
- Approved mineral and/or valid name (A)
- IMA symbol
- Qdv
- Locality
- 🇮🇹 Mount Somma
- Type locality
- —
- Discovery year
- —
Etymology
Named after 4
Source: Wikidata
For sale on the marketplace
View all →
No offers for Quadridavyne at the moment. Browse the marketplace →
