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Minerals - Braunite | TerraCollect
Mineral - Braunite
Braunite
Mn²⁺Mn³⁺₆[O₈|SiO₄][
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
Mn²⁺Mn³⁺₆[O₈|SiO₄][
Unit Cell
Physical Properties
Hardness
6 - 6.5
Streak
black
Density
Heavy (3,5-6)
Optical Properties
Color
black
Birefringence
Luster
Metallic
Transparency
opaque
Pleochroism
Geomineralogical Properties
Crystal System
tetragonal
Point Group
Groups and Members
Braunite-Group
Karten-Ebenen
Geologische Karte
Satelliten Karte
Cleavage
Fracture
Tenacity
ditetragonal-dipyramidal - 4/m 2/m 2/m
Space Group
I4
1
/acd (142)
Habit
coarse,
crusty,
pyramidal,
tabular
Formation
Oxidation zone of manganese deposits, metamorphism
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Braunite
