Lead Sulfide
PbS
|
Chemical name
Lead Sulfide |
|
Mineral name
Galena |
|
Chemical formula
PbS |
|
Melting point [°C]
1118 |
|
Crystal system
cubic |
|
Crystal Class
cubic-hexoctahedral (4/m -3 2/m) |
|
Space Group
Fm-3m |
|
Unit cell
a [Å]:5.94 b [Å]:5.94 c [Å]:5.94 |
|
Molecular weight [g/mol]
239.27 |
|
Formula units
Z=4 |
|
Frequent crystal surfaces
{100}, {111}, {110}, {221} |
|
Twinning
on {111} |
|
Mohs hardness
2.5 - 3 |
|
Density [g/cm3]
7.2 - 7.6 |
|
Cleavage
perfect on {100} |
|
Fracture / Tenacity
brittle, subconchoidal |
|
Color
lead gray, silvery |
|
Streak
lead gray |
|
Transparency
opaque |
|
Luster
metallic |
|
Optical character
isotropic |
