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Ytterbium(III) oxide

Ytterbium(III) oxide is the chemical compound with the formula Yb2O3. It is one of the more commonly encountered compounds of ytterbium. It has the “rare-earth C-type sesquioxide” structure which is related to the fluorite structure with one quarter of the anions removed, leading to ytterbium atoms in two different six coordinate (non-octahedral) environments.

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Further Information

Names

IUPAC nameYtterbium(III) oxide.

Other names

Ytterbia
diytterbium trioxide
ytterbium sesquioxide

Identifiers

CAS Number: 1314-37-0

ECHA InfoCard: 100.013.850

Properties

Chemical formula: YbO23

Molar mass: 394.08 g/mol

Appearance: White solid.

Density: 9.17 g/cm, solid.

Melting point: 2,355 °C (4,271 °F; 2,628 K)

Boiling point: 4,070 °C (7,360 °F; 4,340 K)

Solubility in water: Insoluble

Structure

Crystal structure: Cubic

Coordination geometry: Octahedral

Thermochemistry

Std molar
entropy: 133.05 J/mol·K

Std enthalpy of
formation: -1814.600 kJ/mol

Gibbs free energy: -1726.844 kJ/mol

Hazards

EU classification: None listed.

R-phrases: None listed.

S-phrases: None listed.

NFPA 704:

Flash point: Non-flammable.

Related compounds

anions: Ytterbium(III) sulfide

cations: Thulium(III) oxide

Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).

Infobox references