Mineral - Sigloite
Sigloite
Chemical Properties
Mineral Class
Phosphates
Toxicity
none
Formula
Fe³⁺Al₂(PO₄)₂(OH)₃ · 7H₂O
Unit Cell
Physical Properties
Hardness
3
Streak
white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
brownyellow
Birefringence
Luster
Vitreous,
Pearly
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
triclinic
Point Group
Space Group
Habit
coarse, prismatic, Rhombohedron, tabular
Formation
Oxidation von Vauxit
Paragenesis
Twinning
Rarity
Very rare
Synonyms
Sigloite