Mineral - Kidwellite
Kidwellite
Chemical Properties
Mineral Class
Phosphates
Toxicity
none
Formula
NaFe³⁺₉+x(PO₄)₆(OH)₁₁ · 3H₂O
Unit Cell
Physical Properties
Hardness
3
Streak
yellow
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
yellowgreen
Birefringence
Luster
Vitreous,
Silky
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Space Group
Habit
spherical, kidney-shaped, radial, grape-shaped
Formation
Sekundär, Metasomatose von Phosphaten
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Kidwellite