Bismuth(III) oxide

Bismuth(III) oxide
Names
	IUPAC names Bismuth trioxide; Bismuth(III) oxide; Bismite (mineral)
	Other names Bismuth oxide, bismuth sesquioxide
Identifiers
CAS Number	1304-76-3 ;
3D model (JSmol)	Interactive image;
ChemSpider	14093 ;
ECHA InfoCard	100.013.759
EC Number	215-134-7;
PubChem CID	14776;
UNII	A6I4E79QF1 ;
CompTox Dashboard (EPA)	DTXSID8046537 ;
	InChI InChI=1S/2Bi.3O Key: WMWLMWRWZQELOS-UHFFFAOYSA-N ; InChI=1/2Bi.3O/rBi2O3/c3-1-5-2-4 Key: WMWLMWRWZQELOS-JOBWJGIYAA;
	SMILES O=[Bi]O[Bi]=O;
Properties
Chemical formula	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)
Solubility in water	insoluble
Solubility	soluble in acids
Magnetic susceptibility (χ)	−83.0·10−6 cm3/mol
Structure
Crystal structure	monoclinic, mP20
Space group	P21/c (n° 14)
Lattice constant	a = 816.6 pm, b = 1382.7 pm, c = 585.0 pm α = 90°, β = 90.00°, γ = 90°
Lattice volume (V)	0.66053 nm3
Formula units (Z)	8 formula per cell
Coordination geometry	pseudo-octahedral
Thermochemistry
Heat capacity (C)	113.5 J/(mol K)
Std molar; entropy (S⦵298)	151.5 J/(mol K)
Std enthalpy of; formation (ΔfH⦵298)	-573.9 kJ/mol
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). verify (what is ?) Infobox references

Bismuth(III) oxide is a compound of bismuth, with the chemical formula Bi₂O₃. It is found naturally as the mineral bismite (monoclinic) and sphaerobismoite (tetragonal, much more rare), but 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.