Mineral - Normandite
Normandite
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
NaCa(Mn²⁺,Fe²⁺)(Ti,Nb,Zr)Si₂O₇(O,F)₂
Unit Cell
Physical Properties
Hardness
5.5
Streak
whiteyellowyellow white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
brownorangeyellow
Birefringence
Luster
Vitreous,
Greasy
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Space Group
Habit
acicular, radial
Formation
Magmatisch (Pegmatite)
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Normandite