Lead Copper Hydroxy Sulfate
PbCu[(OH)2|SO4]
Chemical name
Lead Copper Hydroxy Sulfate |
Mineral name
Linarite |
Chemical formula
PbCu[(OH)2|SO4] |
Crystal system
monoclinic |
Crystal Class
monoclinic-prismatic (2/m) |
Space Group
P2_1/m |
Unit cell
a [Å]:9.81 b [Å]:5.65 c [Å]:4.70 |
Molecular weight [g/mol]
400.82 |
Formula units
Z=2 |
Twinning
common on {100}, also {001} |
Mohs hardness
2.5 |
Density [g/cm3]
5.3 - 5.5 |
Cleavage
perfect on {100}, imperfect on {001} |
Fracture / Tenacity
conchoidal |
Color
deep azure blue |
Streak
pale blue |
Transparency
transparent to translucent |
Luster
subadamantine, vitreous |
Optical character
biaxial (-) |
Refractive Index
nα=1.809; nβ=1.838; nΥ=1.859 |
Birefringence δ
0.050 |
Pleochroism δ
moderate |