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Minerals - Hematite | TerraCollect
Mineral - Hematite
Hematite
Fe₂O₃
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Chemical Properties
Mineral Class
Oxides and Hydrxides
Toxicity
none
Formula
Fe₂O₃
Unit Cell
a=5.04 c=13.77 Z=6
Physical Properties
Hardness
5 - 6
Streak
brown
red
red brown
Optical Properties
Color
black
brown
gray
red
Birefringence
0.280
Luster
Metallic
Transparency
opaque
Pleochroism
Geomineralogical Properties
Crystal System
Composition
Elements
Mass
Fe₂O₃
98.14
Mn₂O₃
0.54
FeO
1.29
MnO
0.38
New Jersey (Palache et al. 1952)
Groups and Members
Hematite-Group
Map-Layer
Geological Map
Satellite Map
Density
Heavy (3,5-6)
Cleavage
Fracture
uneven
Tenacity
Brittle
trigonal
Point Group
ditrigonal-scalenohedral -
3
m
Space Group
R
3
c (167)
Habit
prismatic,
pyramidal,
radial,
Rhombohedron,
rosette,
tabular,
grape-shaped,
Cube
Formation
hydrothermal, Metasomatism, Sedimentary (marine, SEDEX, alluvial)
Paragenesis
Twinning
Contact twins after {10
1
0}
Rarity
Common
Synonyms
Hematite
