Copper Oxide Cu2O type
Cu2O
Chemical name
Copper Oxide Cu2O type
Mineral name
Cuprite
Chemical formula
Cu2O
Crystal system
cubic
Crystal Class
cubic-hexoctahedral (4/m 3 2/m)
Unit cell
a [Å]:4.27
b [Å]:4.27
c [Å]:4.27
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]
6.14
Color
dark red to conchoidal red
Transparency
transparent to translucent
Refractive Index
n=2.849
Pleochroism δ
visible