Mineral - Borax
Borax
Chemical Properties
Mineral Class
Borates
Toxicity
none
Formula
Na₂[B₄O₅(OH)₄]·8H₂O
Unit Cell
Physical Properties
Hardness
2 - 2.5
Streak
white
Density
Light (<2)
Cleavage
Fracture
Tenacity
Optical Properties
Color
yellowcolorless
Birefringence
0.025
Luster
Vitreous,
Resinous
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
monoclinic-prismatic - 2/m
Space Group
C2/c (15)
Habit
coarse, prismatic, tabular
Formation
Sedimentary (Evaporite)
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Borax