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Minerals - Nontronite | TerraCollect
Mineral - Nontronite
Nontronite
Na₀,3Fe₂((Si,Al)₄O₁₀)(OH)₂ · nH₂O
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
white
green
green white
Optical Properties
Color
yellow
green
Birefringence
Luster
Resinous,
Waxy
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Space Group
Habit
coarse,
crusty,
spherical
Formation
Verwitterung von Vulkaniten, Metasomatose
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Nontronite
