Solid phase
Official name
Yttrium oxide
Secondary names
Yttrium trioxide; Yttria; Yttriaite-(Y); Y2O3
CAS number
1314-36-9
Family
ionic solid
Class
alkali salt
Compound type
oxide
Formula
Y2O3
Chemical formula
Y2O3
Elemental formula
(Y3+)2 (O2-)3
Isotope mixture type
terrestrial abundance
10.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
Y3+ Yttrium cation element 2 0.4 1 constituent cation main
O2 Oxide anion element 3 0.6 1 constituent anion main
Chemical bonds
  Bond Number
()Y3+O 3
Class
alkali salts (06)
Type
simple alkali salts (06.01)
Equivalent mineral
Yttriaite-(Y)
Phase type
crystalline
Crystal system
isometric (cubic)
Crystal class
diploidal
Crystal class symbol
m-3 (Th)
Crystal spacegroup
Ia-3
Molar mass
225.809 g/mol
Density
5.01 g/cm3
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid liquid Y2O3 2683 K (2410 °C)
Refringence type
isotropic
Refraction index nα
1.930
Pure color
white
Color
white
Diaphaneity
transparent to translucent
Luster
adamantine