Zirconium dioxide

Zirconium dioxide
Names
	IUPAC names Zirconium dioxide; Zirconium(IV) oxide
	Other names Zirconia; Baddeleyite
Identifiers
CAS Number	1314-23-4 ;
3D model (JSmol)	Interactive image;
ChemSpider	56183;
ECHA InfoCard	100.013.844
EC Number	215-227-2;
PubChem CID	62395;
UNII	S38N85C5G0 ;
CompTox Dashboard (EPA)	DTXSID301315847 DTXSID1042520, DTXSID301315847 ;
	InChI InChI=1S/2O.Zr Key: MCMNRKCIXSYSNV-UHFFFAOYSA-N;
	SMILES O=[Zr]=O;
Properties
Chemical formula	ZrO; 2
Molar mass	123.218 g/mol
Appearance	white powder
Density	5.68 g/cm3
Melting point	2,715 °C (4,919 °F; 2,988 K)
Boiling point	4,300 °C (7,770 °F; 4,570 K)
Solubility in water	negligible
Solubility	soluble in HF, and hot H2SO4
Refractive index (nD)	2.13
Thermochemistry
Std molar; entropy (S⦵298)	50.3 J K−1 mol−1
Std enthalpy of; formation (ΔfH⦵298)	–1080 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
Flash point	Non-flammable
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	> 8.8 g/kg (oral, rat)
Safety data sheet (SDS)	MSDS
Related compounds
Other anions	Zirconium disulfide
Other cations	Titanium dioxide; Hafnium dioxide
	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

Zirconium dioxide (ZrO
₂), sometimes known as zirconia (not to be confused with zirconium silicate or zircon), is a white crystalline oxide of zirconium. Its most naturally occurring form, with a monoclinic crystalline structure, is the mineral baddeleyite. A dopant^{[clarification needed]} stabilized cubic structured zirconia, cubic zirconia, is synthesized in various colours for use as a gemstone and a diamond simulant.^[1]

^ Wang, S. F.; Zhang, J.; Luo, D. W.; Gu, F.; Tang, D. Y.; Dong, Z. L.; Tan, G. E. B.; Que, W. X.; Zhang, T. S.; Li, S.; Kong, L. B. (2013-05-01). "Transparent ceramics: Processing, materials and applications". Progress in Solid State Chemistry. 41 (1): 20–54. doi:10.1016/j.progsolidstchem.2012.12.002. ISSN 0079-6786.

Names


IUPAC names Zirconium dioxide Zirconium(IV) oxide
Other names Zirconia Baddeleyite
Identifiers
CAS Number	1314-23-4^Y
3D model (JSmol)	Interactive image
ChemSpider	56183
ECHA InfoCard	100.013.844
EC Number	215-227-2
PubChem CID	62395
UNII	S38N85C5G0^Y
CompTox Dashboard (EPA)	DTXSID301315847 DTXSID1042520, DTXSID301315847
InChI InChI=1S/2O.Zr Key: MCMNRKCIXSYSNV-UHFFFAOYSA-N
SMILES O=[Zr]=O
Properties
Chemical formula	ZrO ₂
Molar mass	123.218 g/mol
Appearance	white powder
Density	5.68 g/cm³
Melting point	2,715 °C (4,919 °F; 2,988 K)
Boiling point	4,300 °C (7,770 °F; 4,570 K)
Solubility in water	negligible
Solubility	soluble in HF, and hot H₂SO₄
Refractive index (n_D)	2.13
Thermochemistry
Std molar entropy (S^⦵₂₉₈)	50.3 J K⁻¹ mol⁻¹
Std enthalpy of formation (Δ_fH^⦵₂₉₈)	–1080 kJ/mol
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
Flash point	Non-flammable
Lethal dose or concentration (LD, LC):
LD₅₀ (median dose)	> 8.8 g/kg (oral, rat)
Safety data sheet (SDS)	MSDS
Related compounds
Other anions	Zirconium disulfide
Other cations	Titanium dioxide Hafnium dioxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is ^YN ?) Infobox references