Solid phase
Official name
Lanthanum(III) oxide
Secondary names
Lanthanum oxide; Lanthanum sesquioxide; lanthanum(3+);oxygen(2-); Lanthana
CAS number
1312-81-8
Type
Family
ionic solid
Class
alkali salt
Compound type
oxide
Chemical composition
Formula
$La{3+}_2 \cdot O^{2-}_3$
Chemical formula
La2O3
Elemental formula
(La3+)2 (O2-)3
Isotope mixture type
terrestrial abundance
10.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$La^{3+}$ Lanthanum cation element 2 0.4 1 constituent cation main
$O^{2-}$ Oxide anion element 3 0.6 1 constituent anion main
Chemical bonds
  Bond Number
$\cdot (\cdot) La^{3+} \cdot O^{2-} \cdot$
Class
alkali salts (06)
Type
simple alkali salts (06.01)
Polymorphs
Phase type
crystalline
Crystal system
various
Molar mass
325.809 $g/mol$
Density
5.84 - 6.51 $g/cm^3$
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid liquid 2588 K (2315°C)
solid-solid A-La2O3 (trigonal) <-> X-La2O3 (cubic) at ~1985 K
Refringence type
various
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