Zinc Ferrite Spinell
ZnFe2O4
|
Chemical name
Zinc Ferrite Spinell |
|
Mineral name
Franklinite |
|
Chemical formula
ZnFe2O4 |
|
Melting point [°C]
Varies by solvent |
|
Crystal system
cubic |
|
Crystal Class
cubic-hexoctahedral (4/m -3 2/m) |
|
Space Group
Fd-3m |
|
Unit cell
a [Å]:8.42 b [Å]:8.42 c [Å]:8.42 |
|
Molecular weight [g/mol]
241.08 |
|
Formula units
Z=8 |
|
Frequent crystal surfaces
{111}, {100}, {110} |
|
Twinning
on (111) |
|
Mohs hardness
6 - 6.5 |
|
Density [g/cm3]
5.07 - 5.22 |
|
Cleavage
on {111} |
|
Fracture / Tenacity
conchoidal, uneven/irregular |
|
Color
black |
|
Streak
reddish brown to black |
|
Transparency
opaque |
|
Luster
metallic to dull |
|
Optical character
isotropic |
|
Refractive Index
n=2.35 |
|
Pleochroism δ
none |
