Mineral - Greifensteinite
Greifensteinite
Chemical Properties
Mineral Class
Phosphates
Toxicity
none
Formula
Ca₂Fe²⁺₅Be₄(PO₄)₆(OH)₄ · 6H₂O
Unit Cell
Physical Properties
Hardness
4.5
Streak
white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
browngreen
Birefringence
Luster
Vitreous
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Space Group
Habit
sheaf-shaped, spherical, prismatic
Formation
Sekundär, Pegmatit
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Greifensteinite