Yttrium(III) oxide

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Yttrium(III) oxide
Names
IUPAC name
Yttrium(III) oxide.
Other names
Yttria,
diyttrium trioxide,
yttrium sesquioxide
Identifiers
  • 1314-36-9 checkY
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.013.849
EC Number
  • 215-233-5
RTECS number
  • ZG3850000
UNII
  • O=[Y]O[Y]=O
Properties
Y2O3
Molar mass 225.81 g/mol
Appearance White solid.
Density 5.010 g/cm3, solid
Melting point 2,425 °C (4,397 °F; 2,698 K)
Boiling point 4,300 °C (7,770 °F; 4,570 K)
insoluble
Solubility in alcohol
acid
soluble
Structure
Cubic (bixbyite), cI80[1]
Ia-3, No. 206
Octahedral
Thermochemistry
Std enthalpy of
formation
ΔfHo298
-1905.310 kJ/mol
Standard molar
entropy
So298
99.08 J/mol·K
Hazards
EU classification None listed.
R-phrases Not hazardous
S-phrases Template:S24/25
Related compounds
Other cations Scandium(III) oxide,
Lanthanum(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

Yttrium oxide is Y2O3. It is an air-stable, white solid substance. Yttrium oxide is used as a common starting material for both materials science as well as inorganic compounds.

References[change | change source]

  1. Yong-Nian Xu; Zhong-quan Gu; W. Y. Ching (1997). "Electronic, structural, and optical properties of crystalline yttria". Phys. Rev. B56 (23): 14993–15000. Bibcode:1997PhRvB..5614993X. doi:10.1103/PhysRevB.56.14993.

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