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Minerals - Niobophyllite | TerraCollect
Mineral - Niobophyllite
Niobophyllite
(K,Na)₃(Fe,Mn)₆(Nb,Ti)₂Si₈(O,OH,F)₃₁
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
(K,Na)₃(Fe,Mn)₆(Nb,Ti)₂Si₈(O,OH,F)₃₁
Unit Cell
Physical Properties
Hardness
3 - 4
Streak
brown
yellow
yellow brown
Optical Properties
Color
brown
orange
yellow
Birefringence
Luster
Vitreous,
Greasy,
Earthy
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
triclinic
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Point Group
Space Group
Habit
prismatic,
tabular
Formation
Magmatisch
Paragenesis
Twinning
Rarity
Very rare
Synonyms
Niobophyllite
