Solid phase
Official name
Germanium dioxide
Secondary names
Germanium(IV) oxide
CAS number
1310-53-8
Type
Family
covalent network solid
Class
tridimentional covalent network solid
Compound type
oxide
Chemical composition
Formula
$GeO_2$
Chemical formula
GeO2
Elemental formula
Ge O2
Isotope mixture type
terrestrial abundance
6.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Ge$ Germanium element 1 0.3333333333333333 1 constituent element main
$O$ Oxygen element 2 0.6666666666666666 1 constituent element main
Class
tridimensional covalent networks (11)
Type
two non-metal (or one metalloid and one non-metal) atoms tridimensional networks (Ceramics) (11.03)
Phase type
crystalline
Crystal system
trigonal
Crystal class
trapezohedral
Crystal class symbol
32 (D3)
Crystal spacegroup
P3(2)21
Molar mass
104.6388 $g/mol$
Density
4.228 $g/cm^3$
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid liquid $GeO_2$ 1115°C (1388 K)
Refringence type
uniaxial
Refringence sign
positive
Birefringence
0.026
Refraction index $n_{\alpha}$
1.651
Refraction index $n_{\beta}$
1.677
Pure color
white
Color
white
Diaphaneity
translucent
Luster
silky
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