Mineral - Borcarite
Borcarite
Chemical Properties
Mineral Class
Borates
Toxicity
none
Formula
Ca₄Mg(B₄O₆(OH)₆)(CO₃)₂
Unit Cell
Physical Properties
Hardness
4
Streak
white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Optical Properties
Color
greenblue
Birefringence
0.067
Luster
Vitreous,
Greasy
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
monoclinic-prismatic - 2/m
Space Group
C2/m (12)
Habit
radial, tabular
Formation
Metasomatism (hydrothermal from Brucite)
Paragenesis
Twinning
Rarity
Rare
Synonyms
Borcarite