Thortveitite
Sc₂Si₂O₇
Silicates
Hardness —
· Monoclinic
Photo: David Hospital · CC BY-SA 4.0
Bornemanite
Na₆(Na☐)Ba₂Ti₂Nb₂(Si₂O₇)₄(PO₄)₂O₄(OH)₂F₂
Seidozerite supergroup, sorosilicate mineral
Properties
- Chemical formula
- Na₆(Na☐)Ba₂Ti₂Nb₂(Si₂O₇)₄(PO₄)₂O₄(OH)₂F₂
- Group
- Silicates
- Crystal system
- Triclinic
- Hardness (Mohs)
- —
- Color
- —
- Luster
- —
- Streak
- —
- Density
- —
- Cleavage
- —
- Fracture
- —
- Tenacity
- —
- Crystal habit
- —
- Transparency
- —
- Space group
- Cc
- Fluorescence
- —
- Magnetism
- —
- Radioactivity
- —
- Refractive index
- —
- Optical character
- —
- Birefringence
- —
- Pleochroism
- —
- Strunz classification
- 9.BE.50
- Dana classification
- 56.4.2.1
- IMA status
- Redefined mineral (Rd)
- IMA symbol
- Bma
- Locality
- 🇷🇺 Karnasurt mine, Karnasurt mount
- Type locality
- —
- Discovery year
- —
Etymology
Named after Irina D. Borneman-Starynkevich
Source: Wikidata
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