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Minerals - Uvarovite | TerraCollect
Mineral - Uvarovite
Uvarovite
Ca₃Cr₂(SiO₄)₃
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
Ca₃Cr₂(SiO₄)₃
Unit Cell
a=12.00 Z=8
Physical Properties
Hardness
6.5 - 7
Streak
white
Density
Heavy (3,5-6)
Optical Properties
Color
green
Birefringence
Luster
Vitreous
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
isometric
Point Group
Composition
Elements
Mass
SiOâ‚‚
36.79
Al₂O₃
1.93
Fe₂O₃
0.41
Cr₂O₃
27.54
MgO
0.50
CaO
32.74
Finland (Dana 1895)
Groups and Members
Garnet-Supergroup
Garnet-Group
Karten-Ebenen
Geologische Karte
Satelliten Karte
Cleavage
Fracture
conchoidal,
uneven
Tenacity
Brittle
hexoctahedral - 4/m
3
2/m
Space Group
Ia
3
d (230)
Habit
Deltoidal icositetrahedron,
dodecahedron,
crusty
Formation
Primarily through hydrothermal metasomatism or contact metamorphism of chromium-bearing ultramafic rocks (e.g., serpentinites) following the influx of calcium-rich fluid phases from adjacent carbonate rocks.
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Uvarovite
