Solid phase
Official name
Cuprous oxide
Secondary names
Copper(I) oxide
CAS number
1317-39-1
Type
Family
covalent network solid
Class
tridimentional covalent network solid
Compound type
oxide
Chemical composition
Formula
$Cu_2O$
Chemical formula
Cu2O
Elemental formula
Cu2 O
Isotope mixture type
terrestrial abundance
6.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Cu$ Copper element 2 0.6666666666666666 1 constituent element main
$O$ Oxygen element 1 0.3333333333333333 1 constituent element main
Chemical bonds
  Bond Number
$Cu-Cu$ 3
$Cu-O-$ 2
Class
tridimensional covalent networks (11)
Type
one metal and one non-metal (or metalloid) tridimensional networks (11.04)
Equivalent mineral
Cuprite
Phase name
cuprite
Phase type
crystalline
Crystal system
isometric (cubic)
Crystal class
hexoctahedral
Crystal class symbol
m-3m (Oh)
Crystal spacegroup
Pm-3m
Molar mass
143.091 $g/mol$
Density
6.0 $g/cm^3$
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid liquid Cu2O 1232°C (1505 K)
Refringence type
isotropic
Refraction index $n_{\alpha}$
2.849
Pure color
red
Color
yellow, red, brown
Diaphaneity
transparent to translucent
Luster
adamantine
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