Mineral - Tunellite
Tunellite
Chemical Properties
Mineral Class
Borates
Toxicity
none
Formula
SrB₆O₉(OH)₂ · 3H₂O
Unit Cell
Physical Properties
Hardness
2.5
Streak
white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
whitecolorless
Birefringence
Luster
Vitreous,
Pearly
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Space Group
Habit
coarse, massive, prismatic, tabular
Formation
Sedimentär, Evaporit
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Tunellite