Copper Oxide Cu2O type
Cu2O
Chemical name
Copper Oxide Cu2O type |
Mineral name
Cuprite |
Chemical formula
Cu2O |
Melting point [°C]
1232 |
Crystal system
cubic |
Crystal Class
cubic-hexoctahedral (4/m 3 2/m) |
Space Group
Pn3m |
Unit cell
a [Å]:4.27 b [Å]:4.27 c [Å]:4.27 |
Molecular weight [g/mol]
143.09 |
Formula units
Z=2 |
Frequent crystal surfaces
(001), (100), (110), (111) |
Twinning
none, except from natural defects |
Mohs hardness
3.5 - 4 |
Density [g/cm3]
6.0 |
Color
dark red to conchoidal red |
Transparency
transparent to translucent |
Refractive Index
n=2.849 |
Pleochroism δ
visible |
Crystal growth method
Natural |
Maximum size
up to 10 x 10 mm, standard 4 x 4 mm |