Iron Carbonate
FeCO3
Chemical name
Iron Carbonate |
Mineral name
Siderite |
Chemical formula
FeCO3 |
Melting point [°C]
Decomposes |
Crystal system
trigonal |
Crystal Class
ditrigonal-scalenohedral (-3 2/m) |
Space Group
R-3c |
Unit cell
a [Å]:4.69 b [Å]:4.69 c [Å]:15.38 |
Molecular weight [g/mol]
115.85 |
Formula units
Z=6 |
Twinning
uncommon lamellar on {01-12} |
Mohs hardness
4 - 4.5 |
Density [g/cm3]
3.7 - 3.9 |
Cleavage
perfect on {10-11} |
Fracture / Tenacity
uneven to conchoidal |
Color
yellow, brown, black |
Streak
white to bright yellowish |
Transparency
transparent to translucent |
Luster
vitreous to pearly |
Optical character
uniaxial (-) |
Refractive Index
nω=1.875; nε=1.633 |
Birefringence δ
0.242 |