Turtmannite
(Mn,Mg)₂₂.₅Mg₃-₃x((V₅+,As₅+)O₄)₃(As³⁺O₃)x(SiO₄)₃O₅-₅x(OH)₂₀+x
Vanado-silicate mineral
Properties
- Chemical formula
- (Mn,Mg)₂₂.₅Mg₃-₃x((V₅+,As₅+)O₄)₃(As³⁺O₃)x(SiO₄)₃O₅-₅x(OH)₂₀+x
- Group
- Silicates
- Crystal system
- —
- Hardness (Mohs)
- —
- Color
- —
- Luster
- —
- Streak
- —
- Density
- —
- Cleavage
- —
- Fracture
- —
- Tenacity
- —
- Crystal habit
- —
- Transparency
- —
- Space group
- —
- Fluorescence
- —
- Magnetism
- —
- Radioactivity
- —
- Refractive index
- —
- Optical character
- —
- Birefringence
- —
- Pleochroism
- —
- Strunz classification
- 8.BE.45
- Dana classification
- 43.4.9.2
- IMA status
- Approved mineral and/or valid name (A)
- IMA symbol
- Tt
- Locality
- 🇨🇭 Turtmanntal
- Type locality
- —
- Discovery year
- —
Etymology
Named after Turtmanntal
Source: Wikidata
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