Iron Tungstate
FeWO4
|
Chemical name
Iron Tungstate |
|
Mineral name
Ferberite |
|
Chemical formula
FeWO4 |
|
Melting point [°C]
N/A |
|
Crystal system
monoclinic |
|
Crystal Class
monoclinic-prismatic (2/m) |
|
Space Group
P 2/c |
|
Unit cell
a [Å]:4.72 b [Å]:5.7 c [Å]:4.96 |
|
Molecular weight [g/mol]
303.69 |
|
Formula units
Z=2 |
|
Mohs hardness
4 - 4.5 |
|
Density [g/cm3]
7.4 - 7.5 |
|
Cleavage
perfect on {010}, parting on {100} and {102} |
|
Color
black |
|
Transparency
nearly opaque |
|
Optical character
biaxial (+) |
|
Refractive Index
nα=2.255; nβ=2.305; nΥ=2.414 |
|
Birefringence δ
0.1590 |
