Solid phase
- Official name
- Lanthanum(III) oxide
- Secondary names
- Lanthanum oxide; Lanthanum sesquioxide; lanthanum(3+);oxygen(2-); Lanthana
- CAS number
- 1312-81-8
- Family
- ionic solid
- Class
- alkali salt
- Compound type
- oxide
- Formula
- $La{3+}_2 \cdot O^{2-}_3$
- Chemical formula
- La2O3
- Elemental formula
- (La3+)2 (O2-)3
- Isotope mixture type
- terrestrial abundance
- Class
- alkali salts (06)
- Type
- simple alkali salts (06.01)
- Phase name
- A-La2O3 (trigonal but sometimes called hexagonal-La2O3)
- Phase type
- crystalline
- Crystal system
- trigonal
- Crystal class symbol
- -3m (D3d)
- Crystal spacegroup
- P-3m1
- Comments
- crystal class: Ditrigonal scalenohedral
- Molar mass
- 325.809 $g/mol$
- Density
- 6.51 $g/cm^3$
- State NTP
- solid
- Phase transitions
-
Phase transition type Other phases Temperature - Pressure solid-solid X-La2O3 (cubic) below ~1985 K
- Refringence type
- uniaxial
- Pure color
- colorless
- Color
- white