Mineral - Nontronite
Nontronite
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
Na₀,3Fe₂((Si,Al)₄O₁₀)(OH)₂ · nH₂O
Unit Cell
Physical Properties
Hardness
1.5 - 2
Streak
whitegreengreen white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
yellowgreen
Birefringence
Luster
Resinous,
Waxy
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Space Group
Habit
coarse, crusty, spherical
Formation
Verwitterung von Vulkaniten, Metasomatose
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Nontronite