Lanthanum(III) oxide | SSHADE

Processing math: 100%

Solid phase

Official name: Lanthanum(III) oxide

Name and identifiers

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

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 functions and bonds

Chemical bonds

	Bond	Number
	$\cdot (\cdot) La^{3+} \cdot O^{2-} \cdot$	7

Class: alkali salts (06)
Type: simple alkali salts (06.01)

Crystallography

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

Physical properties

Molar mass: 325.809 $g/mol$
Density: 6.51 $g/cm^3$

Thermodynamical properties

State NTP

solid

Phase transitions

Phase transition type	Other phases	Temperature - Pressure
solid-solid	X-La2O3 (cubic)	below ~1985 K

Optical properties

Refringence type: uniaxial
Pure color: colorless
Color: white

Links and Publications

Links