Thortveitite
Sc₂Si₂O₇
Silicates
Hardness —
· Monoclinic
Photo: Dave Dyet http://www.shutterstone.com http://www.dyet.com · Public domain
Murmanite
Na₂Ti₂Na₂Ti₂(Si₂O₇)O₄(H₂O)₄
Seidozerite supergroup, sorosilicate mineral
Properties
- Chemical formula
- Na₂Ti₂Na₂Ti₂(Si₂O₇)O₄(H₂O)₄
- Group
- Silicates
- Crystal system
- Triclinic
- Hardness (Mohs)
- —
- Color
- —
- Luster
- —
- Streak
- —
- Density
- —
- Cleavage
- —
- Fracture
- —
- Tenacity
- —
- Crystal habit
- —
- Transparency
- —
- Space group
- triclinic-pedial
- Fluorescence
- —
- Magnetism
- —
- Radioactivity
- —
- Refractive index
- —
- Optical character
- —
- Birefringence
- —
- Pleochroism
- —
- Strunz classification
- 9.BE.27
- Dana classification
- 56.2.7.2
- IMA status
- Redefined mineral (Rd)
- IMA symbol
- Mmn
- Locality
- 🇷🇺 Chinglusuai river valley
- Type locality
- —
- Discovery year
- —
Etymology
Named after Murmansk Oblast
Source: Wikidata
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