Solid phase
Official name
Copper monosulfide
Secondary names
Copper sulfide; Copper(II) sulfide; Cupric sulfide; Covellite
CAS number
1317-40-4
Family
covalent network solid
Class
tridimentional covalent network solid
Compound type
sulfide
Formula
CuS or Cu+3S2S2
Chemical formula
CuS
Elemental formula
Cu S
Isotope mixture type
terrestrial abundance
4.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
Cu Copper element 1 0.5 1 constituent element main
S Sulfur element 1 0.5 1 constituent element main
Class
tridimensional covalent networks (11)
Type
metal homonuclear tridimensional networks (elemental) (11.02)
Phase type
crystalline
Crystal system
hexagonal
Crystal class
dihexagonal-dipyramidal
Crystal class symbol
6/m (C6h)
Crystal spacegroup
P6(3)/mmc
Molar mass
95.611 g/mol
Density
4.76 g/cm3
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid decomposition Cu, S ? above 500 °C, 773 K
Refringence type
uniaxial
Refringence sign
positive
Birefringence
1.170
Refraction index nα
1.450
Refraction index nβ
2.620
Pure color
black
Diaphaneity
opaque
Luster
submetallic