Mineral - Ferro-Hornblende
Ferro-Hornblende
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
□Ca₂(Fe²⁺₄Al)(Si₇Al)O₂₂(OH)₂
Unit Cell
Physical Properties
Hardness
6
Streak
white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
blackgreen
Birefringence
Luster
Vitreous,
Greasy
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Space Group
Habit
acicular, prismatic, tabular
Formation
Magmatisch, Metamorphose
Paragenesis
Twinning
Rarity
Very common
Synonyms
Ferro-Hornblende