Mineral - Probertite
Probertite
Chemical Properties
Mineral Class
Borates
Toxicity
none
Formula
NaCaB₅O₇(OH)₄ · 3H₂O
Unit Cell
Physical Properties
Hardness
3.5
Streak
white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
whitecolorless
Birefringence
Luster
Vitreous
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Space Group
Habit
acicular, prismatic, radial
Formation
hydrothermal
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Probertite