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.[2]

Ytterbium(III) oxide

Names
IUPAC name Ytterbium(III) oxide.
Other names Ytterbia diytterbium trioxide ytterbium sesquioxide
Identifiers
CAS Number	1314-37-0 Y
ECHA InfoCard	100.013.850
UNII	T66CZ53RP4 Y
CompTox Dashboard (EPA)	DTXSID20893855
Properties
Chemical formula	Yb2O3
Molar mass	394.08 g/mol
Appearance	White solid.
Density	9.17 g/cm3, 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 (So298)	133.05 J/mol·K [1]
Std enthalpy of formation (ΔfH⦵298)	-1814.600 kJ/mol [1]
Gibbs free energy (ΔfG˚)	-1726.844 kJ/mol [1]
Hazards
EU classification (DSD) (outdated)	None listed.
R-phrases (outdated)	None listed.
S-phrases (outdated)	None listed.
NFPA 704 (fire diamond)	0 1 1
Flash point	Non-flammable.
Related compounds
Other anions	Ytterbium(III) sulfide, Ytterbium(III) chloride
Other cations	Thulium(III) oxide Lutetium(III) oxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references