Mineral - Bustamite
Bustamite
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
CaMn²⁺(Si₂O₆)
Unit Cell
Physical Properties
Hardness
5.5 - 6.5
Streak
white
Density
Normal (2-3,5)
Cleavage
Fracture
Tenacity
Brittle
Optical Properties
Color
brownpink
Birefringence
0.015
Luster
Vitreous
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
triclinic
Point Group
triclinic-pinacoidal - 1
Space Group
P 1 (2)
Habit
blocky, fibrous, acicular, prismatic, tabular
Formation
Metamorphose, hydrothermal
Paragenesis
Twinning
Rarity
Very rare
Synonyms
Bustamite
Groups and Members
Wollastonite-Group