Mineral - Simpsonite
Simpsonite
Chemical Properties
Mineral Class
Oxides and Hydrxides
Toxicity
none
Formula
Al₄Ta₃O₁₃(OH)
Unit Cell
Physical Properties
Hardness
7 - 7.5
Streak
white
Density
Very Heavy (>6)
Cleavage
Fracture
Tenacity
Optical Properties
Color
brownyellowcolorless
Birefringence
Luster
Vitreous
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
trigonal
Point Group
Space Group
Habit
blocky, prismatic, tabular
Formation
Magmatisch, Pegmatit
Paragenesis
Twinning
Rarity
Rare
Synonyms
Simpsonite