Mineral - Nickeline
Nickeline
Chemical Properties
Mineral Class
Sulfides and sulfosalts
Toxicity
high
Formula
NiAs
Unit Cell
Physical Properties
Hardness
5 - 5.5
Streak
blackbrownbrown black
Density
Very Heavy (>6)
Cleavage
Fracture
Tenacity
Optical Properties
Color
gray
Birefringence
Luster
Metallic
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
hexagonal
Point Group
Space Group
Habit
massive, grape-shaped
Formation
Magmatisch, hydrothermal
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Nickeline