Mineral - Preobrazhenskite
Preobrazhenskite
Chemical Properties
Mineral Class
Borates
Toxicity
none
Formula
Mg₃B₁₁O₁₅(OH)₉
Unit Cell
Physical Properties
Hardness
4 - 5
Streak
white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
whitecolorless
Birefringence
Luster
Vitreous
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
orthorhombic
Point Group
Space Group
Habit
coarse, massive, prismatic
Formation
Sedimentär, Evaporit
Paragenesis
Twinning
Rarity
Rare
Synonyms
Preobrazhenskite