Yttrium(III) oxide
| Names | |
|---|---|
| IUPAC name
Yttrium(III) oxide
| |
| Other names
Diyttrium trioxide
Yttria Yttrium sesquioxide | |
| Properties | |
| 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) |
| Insoluble | |
| Solubility | Reacts with acids |
| Vapor pressure | ~0 mmHg |
| Thermochemistry | |
| Std molar
entropy (S |
99.08 J·mol-1·K-1 |
| Std enthalpy of
formation (ΔfH |
-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.
Contents
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.
