Yttrium(III) oxide

Yttrium(III) oxide

Names
IUPAC name Yttrium(III) oxide
Other names Diyttrium trioxide Yttria Yttrium sesquioxide
Properties
Chemical formula	Y2O3
Molar mass	225.81 g/mol
Appearance	White solid
Odor	Odorless
Density	5.010 g/cm3
Melting point	2,425 °C (4,397 °F; 2,698 K)
Boiling point	4,300 °C (7,770 °F; 4,570 K)
Solubility in water	Insoluble
Solubility	Reacts with acids
Vapor pressure	~0 mmHg
Thermochemistry
Std molar entropy (So298)	99.08 J·mol-1·K-1
Std enthalpy of formation (ΔfHo298)	-1905.310 kJ/mol
Hazards
Safety data sheet	Sigma-Aldrich
Flash point	Non-flammable
Lethal dose or concentration (LD, LC):
LD50 (Median dose)	>10,000 mg/kg (rat, oral) >6,000 mg/kg (mouse, oral)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Yttrium oxide, also known as yttria, is a chemical compound with the formula Y₂O₃.

Properties

Chemical

Yttrium(III) oxide is widely used to make the high temperature superconductor YBa₂Cu₃O₇, known as "1-2-3" to indicate the ratio of the metal constituents.

Physical

Yttrium(III) oxide is a white solid.

Availability

Yttrium(III) oxide is sold by lab suppliers.

Yttrium oxide can be found along with europium oxide in the TV screens, though the amount is very small.

Yttriaite-(Y), approved as a new mineral species in 2010, is the natural form of yttria. It is exceedingly rare, occurring as inclusions in native tungsten particles in a placer deposit of the Bol’shaja Pol’ja (Russian: Большая Полья) river, Prepolar Ural, Siberia.

Preparation

Can be prepared by burning yttrium metal in an oxygen-rich atmosphere.

Projects

• Dental ceramic
• YBCO superconductors

Handling

Safety

Yttrium oxide shows low toxicity, though it's still irritant and should be handled with care.

Storage

In closed clean bottles.

Disposal

Recycle it or dump it in trash.