Mineral - Todorokite
Todorokite
Chemical Properties
Mineral Class
Oxides and Hydrxides
Toxicity
none
Formula
(Na,Ca,K,Ba,Sr)¹⁻x(Mn,Mg,Al)₆O₁₂ · 3-4H₂O
Unit Cell
Physical Properties
Hardness
1.5
Streak
brown
Density
Cleavage
Fracture
Tenacity
Optical Properties
Color
blackbrowngray
Birefringence
Luster
Greasy,
Metallic,
Waxy
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Space Group
Habit
dendritic, fibrous, massive, acicular, radial
Formation
Sekundär, Metasomatose, Sedimentär
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Todorokite