Bismuth(III) oxide

Bismuth(III) oxide is perhaps the most industrially important compound of bismuth. It is also a common starting point for bismuth chemistry. It is found naturally as the mineral bismite (monoclinic) and sphaerobismoite (tetragonal, much more rare), but it is usually obtained as a by-product of the smelting of copper and lead ores. Dibismuth trioxide is commonly used to produce the "Dragon's eggs" effect in fireworks, as a replacement of red lead.

Bismuth(III) oxide
Names
IUPAC names
Bismuth trioxide
Bismuth(III) oxide
Bismite (mineral)
Other names
Bismuth oxide, bismuth sesquioxide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.013.759
EC Number
  • 215-134-7
UNII
  • InChI=1S/2Bi.3O Y
    Key: WMWLMWRWZQELOS-UHFFFAOYSA-N Y
  • InChI=1/2Bi.3O/rBi2O3/c3-1-5-2-4
    Key: WMWLMWRWZQELOS-JOBWJGIYAA
  • O=[Bi]O[Bi]=O
Properties
Bi2O3
Molar mass 465.958 g·mol−1
Appearance yellow crystals or powder
Odor odorless
Density 8.90 g/cm3, solid
Melting point 817 °C (1,503 °F; 1,090 K)
Boiling point 1,890 °C (3,430 °F; 2,160 K)
insoluble
Solubility soluble in acids
-83.0·10−6 cm3/mol
Structure
monoclinic, mP20,
Space group P21/c (No 14)
pseudo-octahedral
Hazards
NFPA 704 (fire diamond)
1
0
0
Flash point Non-flammable
Safety data sheet (SDS) ThermoFisher SDS
Related compounds
Other anions
 Bismuth trisulfide
Bismuth selenide
Bismuth telluride
Other cations
 Dinitrogen trioxide
Phosphorus trioxide
Arsenic trioxide
Antimony trioxide
Supplementary data page
Bismuth(III) oxide (data page)
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
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