Mineral - Rockbridgeite
Rockbridgeite
Chemical Properties
Mineral Class
Phosphates
Toxicity
none
Formula
Fe²⁺Fe³⁺₄[(OH)₅|(PO₄)₃]
Unit Cell
Physical Properties
Hardness
3.5 - 4.5
Streak
graygreengreen grey
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
blackgreen
Birefringence
Luster
Vitreous
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
orthorhombic
Point Group
Space Group
Habit
fibrous, grape-shaped
Formation
Sedimentär
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Rockbridgeite