Mineral - Herderite
Herderite
Chemical Properties
Mineral Class
Phosphates
Toxicity
none
Formula
CaBePO₄(F,OH)
Unit Cell
Physical Properties
Hardness
5 - 5.5
Streak
white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
greencolorless
Birefringence
Luster
Vitreous,
Resinous
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Space Group
Habit
prismatic, tabular
Formation
Magmatisch, (Pegmatite)
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Herderite