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Minerals - Chloritoid | TerraCollect
Mineral - Chloritoid
Chloritoid
(FeÂČâș,Mg,MnÂČâș)Alâ(SiOâ)O(OH)â
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
(FeÂČâș,Mg,MnÂČâș)Alâ(SiOâ)O(OH)â
Unit Cell
Physical Properties
Hardness
6.5
Streak
white
gray
Density
Normal (2-3,5)
Optical Properties
Color
black
gray
green
Birefringence
0.010
Luster
Vitreous,
Pearly
Transparency
translucent,
opaque
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Groups and Members
Chloritoid-Group
Cleavage
Fracture
Tenacity
Point Group
monoclinic-prismatic - 2/m
Space Group
C2/c (15)
Habit
blocky,
prismatic,
tabular
Formation
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Chloritoid
