Magnesium Carbonate
MgCO3
|
Chemical name
Magnesium Carbonate |
|
Mineral name
Magnesite |
|
Chemical formula
MgCO3 |
|
Melting point [°C]
990 |
|
Crystal system
trigonal |
|
Crystal Class
ditrigonal-scalenohedral (-3 2/m) |
|
Space Group
R-3c |
|
Unit cell
a [Å]:4.59 b [Å]:4.59 c [Å]:14.87 |
|
Molecular weight [g/mol]
84.32 |
|
Formula units
Z=6 |
|
Mohs hardness
3.5 - 4.5 |
|
Density [g/cm3]
~3.0 |
|
Cleavage
perfect on [10-11] |
|
Fracture / Tenacity
conchoidal |
|
Color
colorless, white, yellowish, brownish to black |
|
Streak
white |
|
Transparency
transparent to opaque |
|
Luster
vitreous to dull |
|
Optical character
uniaxial (-) |
|
Refractive Index
nω=1.700; nε=1.509 |
|
Birefringence δ
0.191 |
